Wtcommit is a project mainly written in Python, it's free.
README - wtcommit.py
A script to use ngerakines' What The Commit (https://github.com/ngerakines/commitment) messages into your own commits. -- Bruno Jurkovski
Usage: ./wtcommit.py {git | svn} [-m "Real commit message."]
(Parameters between {} represent mandatory parameters while parameters between [] are optional)