diff --git a/README.md b/README.md
index 4294453..3ef3d0b 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Project/Repo:
 
 [![MIT License][license_img]][license_ref]
 [![Supported Python Versions][pyversions_img]][pyversions_ref]
-[![PyCalVer v202007.0036][version_img]][version_ref]
+[![PyCalVer v202007.1036][version_img]][version_ref]
 [![PyPI Releases][pypi_img]][pypi_ref]
 [![PyPI Downloads][downloads_img]][downloads_ref]
 
@@ -89,8 +89,9 @@ WARNING - File not found: pycalver.toml
 Exiting because of '--dry'. Would have written to pycalver.toml:
 
     [pycalver]
-    current_version = "v201902.0001-alpha"
-    version_pattern = "{pycalver}"
+    current_version = "v202010.1001-alpha"
+    version_pattern = "vYYYY0M.BUILD[-TAG]"
+    commit_message = "bump version to {new_version}"
     commit = true
     tag = true
     push = true
@@ -123,8 +124,9 @@ This will add the something like the following to your `setup.cfg`
 ```ini
 # setup.cfg
 [pycalver]
-current_version = "v201902.0001-alpha"
-version_pattern = "{pycalver}"
+current_version = "v201902.1001-alpha"
+version_pattern = "vYYYY0M.BUILD[-TAG]"
+commit_message = "bump version to {new_version}"
 commit = True
 tag = True
 push = True
@@ -164,35 +166,35 @@ it would have made.
 
 ```shell
 $ pycalver bump --dry --no-fetch
-INFO    - Old Version: v201901.0001-beta
-INFO    - New Version: v201902.0002-beta
+INFO    - Old Version: v201901.1001-beta
+INFO    - New Version: v201902.1002-beta
 --- README.md
 +++ README.md
 @@ -11,7 +11,7 @@
 
  [![Supported Python Versions][pyversions_img]][pyversions_ref]
--[![Version v201901.0001][version_img]][version_ref]
-+[![Version v201902.0002][version_img]][version_ref]
+-[![Version v201901.1001-beta][version_img]][version_ref]
++[![Version v201902.1002-beta][version_img]][version_ref]
  [![PyPI Releases][pypi_img]][pypi_ref]
 
 --- src/mymodule_v1/__init__.py
 +++ src/mymodule_v1/__init__.py
 @@ -1,1 +1,1 @@
--__version__ = "v201901.0001-beta"
-+__version__ = "v201902.0002-beta"
+-__version__ = "v201901.1001-beta"
++__version__ = "v201902.1002-beta"
 
 --- src/mymodule_v2/__init__.py
 +++ src/mymodule_v2/__init__.py
 @@ -1,1 +1,1 @@
--__version__ = "v201901.0001-beta"
-+__version__ = "v201902.0002-beta"
+-__version__ = "v201901.1001-beta"
++__version__ = "v201902.1002-beta"
 
 --- setup.py
 +++ setup.py
 @@ -44,7 +44,7 @@
      name="myproject",
--    version="201901.1b0",
-+    version="201902.2b0",
+-    version="201901.1001b0",
++    version="201902.1002b0",
      license="MIT",
 ```
 
@@ -485,10 +487,10 @@ maintainer and no build system) this is a non-issue and you can always use
 ```shell
 $ time pycalver show --verbose
 INFO    - fetching tags from remote (to turn off use: -n / --no-fetch)
-INFO    - Working dir version        : v201812.0018
-INFO    - Latest version from git tag: v201901.0019-beta
-Current Version: v201901.0019-beta
-PEP440         : 201901.19b0
+INFO    - Working dir version        : v202010.1018
+INFO    - Latest version from git tag: v202010.1019-beta
+Current Version: v202010.1019-beta
+PEP440         : 202010.1019b0
 
 real    0m4,254s
 
@@ -506,8 +508,9 @@ section:
 
 ```ini
 [pycalver]
-current_version = "202008.1006-beta"
-version_pattern = "YYYY0M.BUILD[-TAG]"
+current_version = "v202010.1006-beta"
+version_pattern = "vYYYY0M.BUILD[-TAG]"
+commit_message = "bump version to {new_version}"
 commit = True
 tag = True
 push = True
@@ -544,11 +547,11 @@ $ pycalver bump --dry
 @@ -65,7 +65,7 @@
 
  [pycalver]
--current_version = v202008.1005-beta
-+current_version = v202008.1006-beta
+-current_version = v202010.1005-beta
++current_version = v202010.1006-beta
+ version_pattern = "vYYYY0M.BUILD[-TAG]"
+ commit_message = "bump version to {new_version}"
  commit = True
- tag = True
- push = True
 ...
 ```
 
@@ -557,13 +560,47 @@ If everything looks OK, you can do `pycalver bump`.
 ```
 $ pycalver bump --verbose
 INFO    - fetching tags from remote (to turn off use: -n / --no-fetch)
-INFO    - Old Version: v202008.0005-beta
-INFO    - New Version: v202008.0006-beta
-INFO    - git commit --file /tmp/tmpph_npey9
-INFO    - git tag --annotate v202008.0006-beta --message v202008.0006-beta
-INFO    - git push origin v202008.0006-beta
+INFO    - Old Version: v202010.1005-beta
+INFO    - New Version: v202010.1006-beta
+INFO    - git commit --message 'bump version to v202010.1006-beta'
+INFO    - git tag --annotate v202010.1006-beta --message v202010.1006-beta
+INFO    - git push origin v202010.1006-beta
 ```
 
+### Config Parameters
+
+TODO: Descriptions
+
+|  Config Parameter |   Type  |         Description          |
+|-------------------|---------|------------------------------|
+| `current_version` | string  |                              |
+| `version_pattern` | string  |                              |
+| `commit_message`  | string  | ¹Template fro commit message |
+| `commit`          | boolean |                              |
+| `tag`             | boolean |                              |
+| `push`            | boolean |                              |
+
+- ¹ Available placeholders:
+  - `{new_version}`
+  - `{old_version}`
+  - `{new_version_pep440}`
+  - `{old_version_pep440}`
+
+
+### CLI Arguments
+
+TODO: Descriptions
+
+|  CLI Argument | Description |
+|---------------|-------------|
+| --major       |             |
+| --minor       |             |
+| --patch       |             |
+| --pin-date    |             |
+| --no-fetch    |             |
+| --dry         |             |
+| --allow-dirty |             |
+
 
 ## The PyCalVer Format
 
diff --git a/src/pycalver/__main__.py b/src/pycalver/__main__.py
index 9308217..54fc27d 100755
--- a/src/pycalver/__main__.py
+++ b/src/pycalver/__main__.py
@@ -392,15 +392,13 @@ def bump(
     if dry:
         return
 
-    # # TODO (mb 2020-09-05): format from config
-    # commit_message_kwargs = {
-    #     new_version
-    #     old_version
-    #     pep440_new_version
-    #     pep440_old_version
-    # }
-    # cfg.commit_message =
-    commit_message = f"bump version to {new_version}"
+    commit_message_kwargs = {
+        'new_version'       : new_version,
+        'old_version'       : old_version,
+        'new_version_pep440': v1version.to_pep440(new_version),
+        'old_version_pep440': v1version.to_pep440(old_version),
+    }
+    commit_message = cfg.commit_message.format(**commit_message_kwargs)
 
     _try_bump(cfg, new_version, commit_message, allow_dirty)
 
diff --git a/src/pycalver/config.py b/src/pycalver/config.py
index 57223f6..bfe26f6 100644
--- a/src/pycalver/config.py
+++ b/src/pycalver/config.py
@@ -23,6 +23,8 @@ PatternsByGlob = typ.Dict[str, Patterns]
 
 SUPPORTED_CONFIGS = ["setup.cfg", "pyproject.toml", "pycalver.toml"]
 
+DEFAULT_COMMIT_MESSAGE = "bump version to {new_version}"
+
 
 class ProjectContext(typ.NamedTuple):
     """Container class for project info."""
@@ -78,6 +80,7 @@ class Config(typ.NamedTuple):
     current_version: str
     version_pattern: str
     pep440_version : str
+    commit_message : str
 
     commit: bool
     tag   : bool
@@ -92,6 +95,7 @@ def _debug_str(cfg: Config) -> str:
         f"current_version='{cfg.current_version}'",
         "version_pattern='{pycalver}'",
         f"pep440_version='{cfg.pep440_version}'",
+        f"commit_message='{cfg.commit_message}'",
         f"commit={cfg.commit}",
         f"tag={cfg.tag}",
         f"push={cfg.push}",
@@ -238,6 +242,8 @@ def _parse_config(raw_cfg: RawConfig) -> Config:
     version_pattern: str = raw_cfg.get('version_pattern', "{pycalver}")
     version_pattern = raw_cfg['version_pattern'] = version_pattern.strip("'\" ")
 
+    commit_message: str = raw_cfg.get('commit_message', DEFAULT_COMMIT_MESSAGE)
+    commit_message = raw_cfg['commit_message'] = commit_message.strip("'\" ")
     # NOTE (mb 2019-01-05): Provoke ValueError if version_pattern
     #   and current_version are not compatible.
     version.parse_version_info(version_str, version_pattern)
@@ -265,6 +271,7 @@ def _parse_config(raw_cfg: RawConfig) -> Config:
         current_version=version_str,
         version_pattern=version_pattern,
         pep440_version=pep440_version,
+        commit_message=commit_message,
         commit=commit,
         tag=tag,
         push=push,
@@ -333,6 +340,7 @@ DEFAULT_CONFIGPARSER_BASE_TMPL = """
 [pycalver]
 current_version = "{initial_version}"
 version_pattern = "{{pycalver}}"
+commit_message = "bump version to {{new_version}}"
 commit = True
 tag = True
 push = True
@@ -372,6 +380,7 @@ DEFAULT_TOML_BASE_TMPL = """
 [pycalver]
 current_version = "{initial_version}"
 version_pattern = "{{pycalver}}"
+commit_message = "bump version to {{new_version}}"
 commit = true
 tag = true
 push = true
diff --git a/src/pycalver/vcs.py b/src/pycalver/vcs.py
index d7d1e95..5eed4ce 100644
--- a/src/pycalver/vcs.py
+++ b/src/pycalver/vcs.py
@@ -33,7 +33,7 @@ VCS_SUBCOMMANDS_BY_NAME = {
         'ls_tags'     : "git tag --list",
         'status'      : "git status --porcelain",
         'add_path'    : "git add --update {path}",
-        'commit'      : "git commit --file {path}",
+        'commit'      : "git commit --message '{message}'",
         'tag'         : "git tag --annotate {tag} --message {tag}",
         'push_tag'    : "git push origin --follow-tags {tag}",
         'show_remotes': "git config --get remote.origin.url",
@@ -144,20 +144,25 @@ class VCSAPI:
 
     def commit(self, message: str) -> None:
         """Commit added files."""
-        message_data = message.encode("utf-8")
-
-        tmp_file = tempfile.NamedTemporaryFile("wb", delete=False)
-        assert " " not in tmp_file.name
-
-        fobj: typ.IO[bytes]
-
-        with tmp_file as fobj:
-            fobj.write(message_data)
-
         env: Env = os.environ.copy()
-        env['HGENCODING'] = "utf-8"
-        self('commit', env=env, path=tmp_file.name)
-        os.unlink(tmp_file.name)
+
+        if self.name == 'git':
+            self('commit', env=env, message=message)
+        else:
+            message_data = message.encode("utf-8")
+            tmp_file     = tempfile.NamedTemporaryFile("wb", delete=False)
+            try:
+                assert " " not in tmp_file.name
+
+                fobj: typ.IO[bytes]
+
+                with tmp_file as fobj:
+                    fobj.write(message_data)
+
+                env['HGENCODING'] = "utf-8"
+                self('commit', env=env, path=tmp_file.name)
+            finally:
+                os.unlink(tmp_file.name)
 
     def tag(self, tag_name: str) -> None:
         """Create an annotated tag."""