$ git clone -n https://src.fedoraproject.org/rpms/lrslib.git /var/lib/mock/f45-build-17583-501/root/chroot_tmpdir/scmroot/lrslib
Cloning into '/var/lib/mock/f45-build-17583-501/root/chroot_tmpdir/scmroot/lrslib'...
$ git fetch origin 2f126f63b86a652952f5d4d8321e842a482a2da8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lrslib
 * [new ref]         2f126f63b86a652952f5d4d8321e842a482a2da8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f126f6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild