We can reverse changes in a Git repository using two commands: reset and revert. These commands could be used alongside with symbols# like ^ and ~.
reset {commit} is used on local Git repositories. It moves the current branch starting position to the specified commit and discards all changes after that commit. This results in a new commit history. All discarded commits could be still found in Git Reflog.
revert {commit} is used on remote Git repositories. Instead of moving the branch starting position, it creates a commit that revert all the changes done by the commit and after it. No history will be changed other than having a new commit.