title: Gerrit: ! [remote rejected] HEAD -> refs/publish/master (no new changes)
body: <p>I made some changes, committed them and pushed the branch to Gerrit (<code>git push gerrit</code>). Now my changes don't appear in Gerrit and I assume this is because I pushed the changes manually instead of using <a href="https://github.com/openstack-infra/git-review" rel="noreferrer">git review</a>. When I run <code>git review</code> now, Im getting this error:</p>
  
  <pre><code>remote: Processing changes: refs: 1, done    
  To ssh://user@gerrit-host:29418/Project
  ! [remote rejected] HEAD -&gt; refs/publish/master (no new changes)
  error: failed to push some refs to 'ssh://user@gerrit-host:29418/Project'
  </code></pre>
  
  <p>How can I tell Gerrit that my changeset needs to be reviewed?</p>