Your package varnish-agent failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=6999153 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
Created attachment 905942 [details] build.log
Created attachment 905943 [details] root.log
Created attachment 905944 [details] state.log
The test suite is still not entirely robust (timeouts may occur), a simple rebuild did the job. http://koji.fedoraproject.org/koji/buildinfo?buildID=534506