title: git cherry-pick does not work
body: <p>I get a strange error:</p>
  
  <p><code>git cherry-pick a0cd8fe</code></p>
  
  <p><code>fatal: bad revision 'a0cd8fe'</code></p>
  
  <p>Why is that? </p>
  
  <p>Note that the branch that <code>a0cd8fe</code> was merged to has been deleted. Is that why I get this error?</p>