These two fields allow to specify a different default assignee for ticket opened against this package in bugzilla. Note: The EPEL field is always displayed for packages in the 'rpms' namespace regardless of whether it is used in bugzilla or not.
That package has been obsoleted and should no longer be in Rawhide (see also http://lists.fedoraproject.org/pipermail/devel/2013-February/178963.html).