title: How to do 'git checkout --theirs' for multiple files (or all unmerged files)
body: <p>Say I have this after attempting a merge and upon entering <code>git status</code>:</p>
  
  <pre><code># Unmerged paths:
  #   (use "git add/rm &lt;file&gt;..." as appropriate to mark resolution)
  #
  #   added by them: myfile1.xhtml
  #   added by them: myfile2.xhtml
  #   added by them: myfile3.xhtml
  </code></pre>
  
  <p>... and I know I want to do this for each of those files:</p>
  
  <pre><code>git checkout --theirs myfile1.xhtml
  git add myfile1.xhtml
  </code></pre>
  
  <p>... but there are many of them. How might I do them as a batch?</p>