$ git clone -n https://src.fedoraproject.org/rpms/gnome-logs.git /var/lib/mock/f45-build-11442-430/root/chroot_tmpdir/scmroot/gnome-logs
Cloning into '/var/lib/mock/f45-build-11442-430/root/chroot_tmpdir/scmroot/gnome-logs'...
$ git fetch origin b79a3ffe4ac9ff0ef9608fa166b7664b8d91960a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-logs
 * [new ref]         b79a3ffe4ac9ff0ef9608fa166b7664b8d91960a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b79a3ff Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild