title: Pushing without committing
body: <p>I have a git repo and I just pushed it to a server. Then I setup a post-receive hook on the server. I want to check it works. I have to commit again just to see if it works? I would really like to just force a push while I'm trying to get this set up rather than keep making commits that have no real value. Its not working, and I just don't get it.</p>
  
  <pre><code>$ git push --force origin master
  Everything up-to-date
  </code></pre>