title: Cherry-Picking commit from someone's PR
body: <p>I am working on a github repository (not mine) and want to cherry-pick some commits from someone else's PR (so that the ownership remains) and then make a new PR with some more changes. I am currently on a branch <code>modular</code> and the PR from which I want to cherry-pick is <code>abc: eq_modular</code>.</p>
  
  <p>I have tried using the command, </p>
  
  <pre><code>&gt;&gt;&gt; git cherry-pick xyz
  fatal: bad object xyz
  </code></pre>
  
  <p>where xyz is the hash for the commit I want to pick.</p>
  
  <p>I couldn't find any solution for the problem. So if anyone could suggest anything on the issue it would be of great help.</p>