title: How can I commit with no fast forward option (--no-ff) in SourceTree?
body: <p>I'd like to preserve merge commits even if there was no change in the originating branch since than.</p>
  
  <p>Is there such an option in <a href="http://www.sourcetreeapp.com/">Atlassian SourceTree</a>? I just can't find it at the first sight.</p>