title: How do I change the HEAD to a previous revision
body: <p>We've got a situation where someone messed up a Commit to our SVN server. A lot of files were deleted, etc. </p>
  
  <p><strong>Question:</strong> What is the technique for making the previous (to the bad Commit) revision the HEAD revision? I've seen discussion here on SO for doing this for 1 file, but we'd like to make it like that last commit never happened. Any ideas?</p>
  
  <p>All of these answers seem to be correct. I marked abatishchev's answer as the correct answer simply because I'm using Tortoise SVN and it's the method I actually used.</p>