title: Git Working tree is dirty
body: <p>If I execute <code>git review</code> git shows me "Working tree is dirty" error.</p>
  
  <p>I made a commit and I sent to review. After that I update the branch from the upstream using <code>git pull</code>. Now I need to modify the previous commit message, so, there are my commands:</p>
  
  <p>1) <code>git reset &lt;id-of-the-commit-to-modify&gt;</code></p>
  
  <p>2) <code>git commit --amend</code></p>
  
  <p>vim was opened to modify my commit. But here appears information about my commit and others commits as well and I don't know why. However, I modified the commit message and write/close vim.</p>
  
  <p>3) <code>git review</code></p>
  
  <p>This command raise this error:</p>
  
  <pre><code>Errors running git rebase -i remotes/gerrit/master
  doc/source/configuration.rst: needs update
  doc/source/developing.rst: needs update
  tools/sample_data.sh: needs update
  Working tree is dirty
  </code></pre>
  
  <p>What I doing wrong?</p>