$ git clone -n https://src.fedoraproject.org/rpms/python-google-cloud-bigquery.git /var/lib/mock/f38-build-side-42-init-devel-592215-26145/root/chroot_tmpdir/scmroot/python-google-cloud-bigquery
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-592215-26145/root/chroot_tmpdir/scmroot/python-google-cloud-bigquery'...
$ git fetch origin c6ca2276a88181dd22841688e0043e3410480d09:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-google-cloud-bigquery
 * [new ref]         c6ca2276a88181dd22841688e0043e3410480d09 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6ca227 Update to 3.9.0 rhbz#2182448