Add --revision parameter to allow to control the commits used to generate the changelog

gitdch

@@ -148,6 +148,17 @@ parser.add_argument(
     help='Specify an optional Markdown release notes output path'
 )
 
+parser.add_argument(
+    '--revision',
+    type=str,
+    dest='revision',
+    help=(
+        'Specify the revision to use to generate the changelog (see '
+        'git-rev-parse for viable options, optional, default: generate the '
+        'changelog with all commits of the current branch) '
+    ),
+    default=None
+)
 
 options = parser.parse_args()
 
@@ -225,7 +236,7 @@ version = (
     )
 )
 messages = []
-for commit in repo.iter_commits():
+for commit in repo.iter_commits(rev=options.revision):
     if version_commit is None:
         version_commit = commit
     log.debug('Commit %s', commit)