title: git update-index --assume-unchanged and git reset
body: <p>Here is the scenario:</p>
  
  <p>In my working directory, I have a number of files (let's call them A,B,C) that I've edited.  I then ran <code>git update-index --assume-unchanged</code> on those files.  Now <code>git status</code> returns blank.  Good.</p>
  
  <p>Now, if I do a <code>git reset --hard</code>, the contents of the files A,B, and C, revert back to the contents before I've edited them and "assume-unchanged" them.  </p>
  
  <p>Is there a way to stop git from actually reverting files A,B, and C, and simply ignore them? </p>
  
  <p>Thanks,</p>
  
  <p>Ken</p>