$ git clone -n https://src.fedoraproject.org/rpms/libspelling.git /var/lib/mock/f42-build-side-1-3499045-45964/root/chroot_tmpdir/scmroot/libspelling
Cloning into '/var/lib/mock/f42-build-side-1-3499045-45964/root/chroot_tmpdir/scmroot/libspelling'...
$ git fetch origin 0c211da70147421bf86a7388f4b73dd557a85357:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libspelling
 * [new ref]         0c211da70147421bf86a7388f4b73dd557a85357 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c211da Update to 0.4.7