Your package sagemath failed to build from source in current F28. https://koji.fedoraproject.org/koji/taskinfo?taskID=24894649 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
Created attachment 1443005 [details] build.log
Created attachment 1443006 [details] root.log
Created attachment 1443007 [details] state.log
Version 8.2 has been built successfully in Rawhide.