title: Change default email in Git gives error on pull
body: <p>I am aware <a href="https://stackoverflow.com/questions/6808653/fatal-the-remote-end-hung-up-unexpectedly-while-pushing-to-git-repository">of this question</a> because I am getting the same error message. Yesterday I added a new email address to my github account and set it to default. Today I tried a <code>git pull</code> and received this error:</p>
  
  <pre><code>fatal: The remote end hung up unexpectedly
  </code></pre>
  
  <p>I attempted <code>ssh -T git@github.com</code> and it succeeded. Is it now true that I need to reset or get new git keys? If not, what could the problem be?</p>
  
  <p>EDIT: Github was having problems today. The problem has been solved now that github is back up.</p>