title: Update to a particular revision in SVN?
body: <p>I performed an <code>svn co -r XXX ...</code>. I deleted a file and then [accidentally] performed <code>svn up</code>. That updated to HEAD, so I lost my changes at XXX.</p>
  
  <p>Is it possible to perform an update against a particular revision? If so, how?</p>
  
  <p>Related, it is possible to undo the update to HEAD so I go back to XXX + local revisions?</p>