title: How to do a "git checkout -f" from emacs-git?
body: <p>In the emacs-git mode for emacs, is there a way to do a <code>checkout -f</code> or equivalent?   </p>
  
  <p>I've only recently started using emacs-git.  I've liked it so far, until I tried to switch to another branch and got a message about an "untracked working tree file would be overwritten" and the checkout is aborted.    </p>
  
  <p>Previously when using git from the commandline I've always just done <code>git checkout -f &lt;branch&gt;</code> to switch branches, but I can't seem to find the equivalent of the <code>-f</code> switch in emacs-git.  </p>
  
  <p>Any ideas?</p>