Back when I was still on Reddit, I made a comment on a chess sub saying that in chess you are not allowed to make your king "commit suicide" to explain how a stalemate works. One day later I got a message about suicide prevention because someone flagged me for promoting suicide.
One of my favorite moments on reddit was spotting a bot that spouted unrelated nonsense. I checked the comment history and found users responding earnestly to the nonsense. While it was hilarious, it was also quite sad, the state of those people.
Yeah, imagine you accidently commit over weeks of work, or hell, if it's the main branch, and you deleted the other origin branch prior to merging, it could be a lot more than a few weeks worth of work. The revert to a previous commit... shutters.
I don't know if you're joking, but in case you're not: git reflog and git reset --hard HEAD@{n} is your friend. You can undo almost anything. Deleted commits and branches aren't really deleted. Remotely deleted branches can be pushed again.
Except for an (accidental) git restore/git reset. Those are permanent and can't be undone.