I don't know. I've gotten away with using pretty much the commands in this guide for almost three years now (professionally): https://rogerdudler.github.io/git-guide/ - I even structure my orgs internal git documentation around these commands for newbies (with sources of course).

There are times when you need to troubleshoot a few things but most of the time you can just delete your local repo and reclone it - easy peazy. One of the other great things about git is that even if you do somehow fuck something up upstream it is really easy to get it back. Heck I think git is pretty awesome.