Your package ngrep failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=10116678 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
Created attachment 1047466 [details] build.log
Created attachment 1047467 [details] root.log
Created attachment 1047468 [details] state.log
The cause of this FTBFS is this package's configure script not honoring CFLAGS.
http://koji.fedoraproject.org/koji/taskinfo?taskID=10308609