What about branching and then doing: git reset --hard commit-hash where commit-hash is the last known working commit. Just do that with all the repos around

What about branching and then doing: git reset --hard commit-hash where commit-hash is the last known working commit. Just do that with all the repos around the date it last worked. If there are alot of commits between the last working version and HEAD it is easier to do this then reverting each commit.