Correct way to downgrade

[elistys]

Until now when I want to downgrade the webUI

git checkout v1.x.x

I entered the command and ran it. (The version number is arbitrary)
I've also seen some websites that provide instructions on how to do this.

But in this thread

git reset --hard 22bcc7b

It is advised that.

[git checkout v1.x.x] is the wrong way ?
[git reset --hard comitash(?)] Is this the correct way to downgrade?
and
[git reset --hard v1.x.x] is the wrong way ?

Is everything ok?
Or is it different for Win and Mac?(i use mac)
I couldn't find any explanation on wiki.