$ git clone -n https://src.fedoraproject.org/rpms/perl-AnyEvent-HTTP-Server.git /var/lib/mock/f45-build-21655-587/root/chroot_tmpdir/scmroot/perl-AnyEvent-HTTP-Server
Cloning into '/var/lib/mock/f45-build-21655-587/root/chroot_tmpdir/scmroot/perl-AnyEvent-HTTP-Server'...
$ git fetch origin f00efbe53d565c87ad9fc5ef023383c984c0aa30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-AnyEvent-HTTP-Server
 * [new ref]         f00efbe53d565c87ad9fc5ef023383c984c0aa30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f00efbe Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild