Your package isdn4k-utils failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=10098045 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
Created attachment 1047061 [details] build.log
Created attachment 1047062 [details] root.log
Created attachment 1047063 [details] state.log
it's fixed in isdn4k-utils-3.2-101.fc23 http://koji.fedoraproject.org/koji/taskinfo?taskID=10330417