$ git clone -n https://src.fedoraproject.org/rpms/lorax-templates-rhel.git /var/lib/mock/f39-build-2553720-61951/root/chroot_tmpdir/scmroot/lorax-templates-rhel
Cloning into '/var/lib/mock/f39-build-2553720-61951/root/chroot_tmpdir/scmroot/lorax-templates-rhel'...
$ git fetch origin fedda7f243860949223b50ebd8d9547352c02fe0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lorax-templates-rhel
 * [new ref]         fedda7f243860949223b50ebd8d9547352c02fe0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fedda7f Package is built only for ELN