$ git clone -n https://src.fedoraproject.org/rpms/genesis-simulator.git /var/lib/mock/f45-build-9715-408/root/chroot_tmpdir/scmroot/genesis-simulator
Cloning into '/var/lib/mock/f45-build-9715-408/root/chroot_tmpdir/scmroot/genesis-simulator'...
$ git fetch origin f957fd44379251e1043430a52c7d29ce789f287c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/genesis-simulator
 * [new ref]         f957fd44379251e1043430a52c7d29ce789f287c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f957fd4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild