ros/rosdistro — pull request #3989 by tfoote (2014-04-22 04:11:41+00:00)
Title: The source version must be a branch and not a tag

A tag causes the devel build to rebuild every time it polls.
http://jenkins.ros.org/job/devel-hydro-perception_oru/

Rolls back part of #3849
FYI @tstoyanov