$ git clone -n https://src.fedoraproject.org/rpms/libspelling.git /var/lib/mock/f45-build-17031-495/root/chroot_tmpdir/scmroot/libspelling
Cloning into '/var/lib/mock/f45-build-17031-495/root/chroot_tmpdir/scmroot/libspelling'...
$ git fetch origin e170640107a953181a0c7e019fb0e424db8e189a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libspelling
 * [new ref]         e170640107a953181a0c7e019fb0e424db8e189a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e170640 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild