Your package varnish failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=10155415 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
Created attachment 1048408 [details] build.log
Created attachment 1048409 [details] root.log
Created attachment 1048410 [details] state.log
This bug appears to have been reported against 'rawhide' during the Fedora 23 development cycle. Changing version to '23'. (As we did not run this process for some time, it could affect also pre-Fedora 23 development cycle bugs. We are very sorry. It will help us with cleanup during Fedora 23 End Of Life. Thank you.) More information and reason for this action is here: https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora23
Built without problems in koji for me. I guess it was only a timing glitch in the tests, caused by heavy load on the builders, because of the mass rebuild. https://koji.fedoraproject.org/koji/taskinfo?taskID=10635546