title: Git GUI push button does not work
body: <p>I was copying my repository to github from my local computer using the command - 
  git push origin master, after cd-ing into my repo directory. </p>
  
  <p>When, I tried this using Git gui, I can scan for changes to the repo and commit them.
  But I cannot push them to my remote repository. How do I find out the reason for 
  this error and how do I fix it ?</p>