how to delete a last commit in git code example

Example 1: git undo last commit

$ git reset --soft HEAD~1

Example 2: roll back last commit in git

git reset --soft HEAD~1

Example 3: pop last commit git

#this  will preserve changes done to your files
git reset --soft HEAD~1

#this will get rid of the commit and the changes done to the files
$ git reset --hard HEAD~1

Example 4: reset last commit

$ git reset --soft HEAD~1