c:\myproject>git branch -a
c:\myproject>git branch origin/trunk refs/remotes/trunk
fatal: Not a valid object name: 'refs/remotes/trunk'.
fatal: Not a valid object name: 'refs/remotes/trunk'
Your tutorial is probably made with a different version of
git-svn. Formerly the
--prefix was empty by default, in newer versions it is
origin/ by default. Because of that you have now
refs/remotes/origin/trunk and so on instead of