$ git clone -n https://src.fedoraproject.org/rpms/lighttpd.git /var/lib/mock/f45-build-17379-498/root/chroot_tmpdir/scmroot/lighttpd
Cloning into '/var/lib/mock/f45-build-17379-498/root/chroot_tmpdir/scmroot/lighttpd'...
$ git fetch origin d55c2ccdd9e40827d50f8b131535272223f2e896:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lighttpd
 * [new ref]         d55c2ccdd9e40827d50f8b131535272223f2e896 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d55c2cc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild