$ git clone -n https://src.fedoraproject.org/rpms/light-locker.git /var/lib/mock/f45-build-17352-498/root/chroot_tmpdir/scmroot/light-locker
Cloning into '/var/lib/mock/f45-build-17352-498/root/chroot_tmpdir/scmroot/light-locker'...
$ git fetch origin 5c74da9ef6872e7c40192832b53c5ece68f6a4c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/light-locker
 * [new ref]         5c74da9ef6872e7c40192832b53c5ece68f6a4c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c74da9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild