I took it upon myself to introduce Git to my colleagues: statisticians who've never used version control. I tried to preempt hard questions by going into a rep

I took it upon myself to introduce Git to my colleagues: statisticians who've never used version control. I tried to preempt hard questions by going into a repo, wrecking it like a mad bull, and trying to undo the damage with Git. Turns out, it was a great way to learn for myself. Exercises: - Commit a "secret" and involve it in other branches, commits, merges, etc. Then remove the secret so that nobody can ever learn it from the repo. - Clone a repo from another local repo and then rewrite history with rebase and revert. Then commit different work in each repo. What's the least painful way to get them "compatible" without losing any work?