Your package rubygem-aws-sdk-core failed to build from source in current rawhide. https://koji.fedoraproject.org/koji/taskinfo?taskID=17789655 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1254128 [details] build.log
Created attachment 1254129 [details] root.log
Created attachment 1254130 [details] state.log
valtri's rubygem-aws-sdk-core-2.6.19-1.fc26 completed http://koji.fedoraproject.org/koji/buildinfo?buildID=860047