$ git clone -n https://src.fedoraproject.org/rpms/python-google-cloud-spanner.git /var/lib/mock/f38-build-side-42-init-devel-822800-28346/root/chroot_tmpdir/scmroot/python-google-cloud-spanner
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-822800-28346/root/chroot_tmpdir/scmroot/python-google-cloud-spanner'...
$ git fetch origin 647244fb14c6ef86a7d6467f07ba67e5d3cc42db:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-google-cloud-spanner
 * [new ref]         647244fb14c6ef86a7d6467f07ba67e5d3cc42db -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 647244f Update to 3.30.0 rhbz#2183935