title: How to make git-diff and git log ignore new and deleted files?
body: <p>Sometimes there's a couple of changed files together with some new, deleted and/or renamed files. When doing <code>git diff</code> or <code>git-log</code> I'd like to omit them, so I can better spot the modifications.</p>
  
  <p>Actually, listing the names of the new and deleted files without their content would be best. For "old" renamed to "new" I'd like to optionally get the difference between "old" and "new".</p>