RemiBou/Core — comment on commit cd3bbe8015aa2a1b2a3efd53d5891906abafb251
File:  line 0
By rbellamy:

So, the short answer is: http://superuser.com/questions/35267/how-can-i-roll-back-1-commit

The longer answer is that it's simple enough to revert a commit, but sometimes it makes more sense to delete the repository, re-fork/clone and then reapply your changes.