title: How to rollback github repository to a previous commit?
body: <p>How do I revert my Github Repository on Github to it's previous state?<br>
  I had made some change and committed them to github, but now I want to undo those changes on github. How would I do that?   </p>
  
  <p>I tried doing <code>git reset --hard 7727c5bfa99
  </code> but that ONLY changed the repository on my computer and not on the github website</p>