Your package mkvtoolnix failed to build from source in current rawhide. Build logs: root.log: http://kojipkgs.fedoraproject.org/work/tasks/7352/4947352/root.log build.log: http://kojipkgs.fedoraproject.org/work/tasks/7352/4947352/build.log state.log: http://kojipkgs.fedoraproject.org/work/tasks/7352/4947352/state.log For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_19_Mass_Rebuild
The logs might have been already garbage collected. You can see task status at the following URL: "http://koji.fedoraproject.org/koji/taskinfo?taskID=4947352
local mock built fine. Fixing the bogus date rpm error and resubmitted, worked fine. https://koji.fedoraproject.org/koji/buildinfo?buildID=397718