$ git clone -n https://src.fedoraproject.org/rpms/perl-Jemplate.git /var/lib/mock/f45-build-24308-603/root/chroot_tmpdir/scmroot/perl-Jemplate
Cloning into '/var/lib/mock/f45-build-24308-603/root/chroot_tmpdir/scmroot/perl-Jemplate'...
$ git fetch origin 7c78269073e9298a19acc2826d095fd71fa71239:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Jemplate
 * [new ref]         7c78269073e9298a19acc2826d095fd71fa71239 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c78269 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild