title: Find revision in trunk that a branch was created from
body: <p>I am trying to merge the latest changes from trunk into a branch of my project, but the problem is I don't know what revision of the trunk I checked out that I eventually created the branch from.  I would think SVN logged this somewhere.  Does anyone know how I can find the revision number?</p>
  
  <p>(In other words, the Subversion equivalent of <code>git merge-base master branch-name</code>)</p>