title: git log --author not showing all commits
body: <p>I've made dozen of commits but when I do a <code>git log --author=pauld</code> I'm only seeing the last three. Without the author filter the full history is shown. I've tried variations with <code>--full-history</code> and a few other options but nothing seems to work. For some reference, I need to list of commits by an author since I given date so that they can be cherry picked. This is just a strange road block early on I didn't expect.</p>