Is there a way to specify a git commit.template that is relative to a repository?
For configuration an example is
$ git config commit.template $HOME/
You can always specify a template at commit-time with -t or --template=.
-t
--template=
See: http://git-scm.com/docs/git-commit
Another option might be to use a prepare-commit-msg hook: https://stackoverflow.com/a/3525532/289099
prepare-commit-msg