title: Fetch latest patch set from git using gerrit link
body: <p>I have gerrit link of an unmerged change, would like to fetch the latest Patch set from that change, is it possible ?</p>
  
  <p>for instance, below is my cherry pick command, I don't know the patch set, can I provide LATEST or something in place of <code>&lt;dontKnowPsNo.&gt;</code> ? or any other way?</p>
  
  <pre><code>git fetch ssh://&lt;URL&gt;:#####/path/to/project refs/changes/20/12345/&lt;dontKnowPsNo.&gt; &amp;&amp; git cherry-pick FETCH_HEAD
  </code></pre>