See the issues, it's already implemented, but not released yet. The issue is that I also am working on the gitlab snippets… which lacks an API. So I'm currently working on a patch to add an API to the gitlab snippets, so my tool can have gitlab snippets!

https://github.com/guyzmo/git-repo/commit/59c7ac2cd4c0316016...

So pretty soon I hope I'll be able to finish both MR and snippets for gitlab, and finish the tests and merge all that back to git-repo!