title: A git diff for what's new/modified/deleted from my current branch
body: <p>I've been playing with <code>git diff</code> a little bit and I can't seem to find a way to compare two branches for new/modified/deleted files coming only from my branch.</p>
  
  <p>Let's says we got <code>master</code> and <code>dev</code>, which is the branch I'm working on. I would like to <code>git diff</code> them but only get what I modified in dev compared to master.</p>