title: How do I delete all untracked files from my working directory in Mercurial?
body: <p>Is it possible to delete all untracked files from my working directory? Let's say I added a bunch of files to my working directory, didn't add them via 'hg add' and now want to get rid of those new files entirely?</p>
  
  <p>I'm on windows, although I'm using PowerShell, so a combined solution is also possible here.</p>