title: Closing a pull request and opening a new one with the same changes
body: <p>I made a branch from our main branch, made changes and now have a PR out there that's being commented on, with me updating it and incorporating those changes.</p>
  
  <p>It's been modified quite a bit and a lot of the comments are now out of date.  I'd really like to close this PR and open a new one, with all of my changes in it.  How can I best do that?</p>