Your package python-django-piston failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=10142855 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
Created attachment 1047808 [details] build.log
Created attachment 1047809 [details] root.log
Created attachment 1047810 [details] state.log
retired the package. upstream is dead.