Your package varnish-agent failed to build from source in current rawhide. https://koji.fedoraproject.org/koji/taskinfo?taskID=17790846 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1254447 [details] build.log
Created attachment 1254448 [details] root.log
Created attachment 1254449 [details] state.log
This is probably the test suite being brittle as usual (port collisions may happen) bug I can't attempt a new build until bug 1422256 is solved.
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
I have actually retired the package, it does not work with Varnish 5 and I will bring it back if upstream takes care of it.