How is git reset HEAD different from git rm --cached?

Question

git

Absolutely monstrous thing this git.
What is the difference between these commands? And why did git rm --cachedit appear only once, at the first commit?

Answer 1

And why did git rm --cached show up only once, on the first commit?

who seemed? when it seems that Etssamae needs to be overshadowed!
nothing monstrous - https://git-scm.com/book/en/v2 everything is here.