$ git clone -n https://src.fedoraproject.org/rpms/libmawk.git /var/lib/mock/f45-build-16537-487/root/chroot_tmpdir/scmroot/libmawk
Cloning into '/var/lib/mock/f45-build-16537-487/root/chroot_tmpdir/scmroot/libmawk'...
$ git fetch origin 79959a8b41c0216ff96f057e658ed758d5dbf1f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmawk
 * [new ref]         79959a8b41c0216ff96f057e658ed758d5dbf1f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79959a8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild