$ git clone -n https://src.fedoraproject.org/rpms/python-multiecho.git /var/lib/mock/f38-build-side-42-init-devel-1269685-30643/root/chroot_tmpdir/scmroot/python-multiecho
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1269685-30643/root/chroot_tmpdir/scmroot/python-multiecho'...
$ git fetch origin 9d1e8894b04890a05b44d2e0ced1b4add116750e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-multiecho
 * [new ref]         9d1e8894b04890a05b44d2e0ced1b4add116750e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d1e889 Update to 0.29 (close RHBZ#2234817)