Your package rakudo-star failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=5765802 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_20_Mass_Rebuild
I fixed the issue. A build of rakudo-star for f20 is done: http://koji.fedoraproject.org/koji/taskinfo?taskID=5788967
I made the doc bugfix unversioned and use the new macro _pkgdocdir. Rebuild is done at: http://koji.fedoraproject.org/koji/taskinfo?taskID=5789825
I think I can close the ticket. A rebuild can now be done.