how to go back to previous version of git code example

Example 1: how to return to latest version on git

// we need to type both of them git fetch origin git reset --hard origin/master

Example 2: git go back to previous commit

git checkout 12feg3435 #commit ID

Example 3: git command change to previous comit

git checkout <commit_id>
git checkout -b <new branch> <commit_id>
git checkout HEAD~X // x is the number of commits t go back