Your package rubygem-hitimes failed to build from source in current F28. https://koji.fedoraproject.org/koji/taskinfo?taskID=24890492 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
rubygem-hitimes tests suite might sometimes be unstable.
*** Bug 1583293 has been marked as a duplicate of this bug. ***