how to revert my code to my last commit code example

Example 1: git undo commit

# Uncommit the changes
git reset --soft HEAD~1

# Completely delete the changes
git reset --hard HEAD~1

Example 2: undo most recent commit

$ git commit -m "some comment"                
$ git reset HEAD~                                          
<< edit files as necessary >>                              
$ git add ...                                              
$ git commit -c ORIG_HEAD