I would love to have this available in git. I know if you make mistakes you can use the reflog, but if you need 5 tries to get something right reading the reflog quickly becomes impossible. Plus there are operations, like rebase or merge, that feel the need to make 50 entries in the reflog.

I've resorted to copying the entire directory (including the .git part) and then trying on the copy. The issue is that I'm working on a C++ program that has a few gigabytes of data.