$ git clone -n https://src.fedoraproject.org/rpms/jisksp16-1990-fonts.git /var/lib/mock/f45-build-14395-459/root/chroot_tmpdir/scmroot/jisksp16-1990-fonts
Cloning into '/var/lib/mock/f45-build-14395-459/root/chroot_tmpdir/scmroot/jisksp16-1990-fonts'...
$ git fetch origin 810eb8e18af99be1f4ba0edb24b09cf94a198aec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jisksp16-1990-fonts
 * [new ref]         810eb8e18af99be1f4ba0edb24b09cf94a198aec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 810eb8e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild