Honestly I still find a lot of engineers don't know git properly. Like they know enough to commit and push but that's about it. It really helps to understand everything git has to offer.
The three most important basic git operations to know (in my opinion) git checkout -b git log git rebase -i
Things that really helped me understand git as a tree of references.
Git reset —soft and git reset —hard
Git cherry-pick
Git rebase
Git reflog
Git stash
Understanding this makes you able to manipulate branches and commits like a wizard. Once I learnt those, I can get myself out of the hairiest git problems.