$ git clone -n https://src.fedoraproject.org/rpms/python-google-cloud-pubsub.git /var/lib/mock/f38-build-side-42-init-devel-969565-28811/root/chroot_tmpdir/scmroot/python-google-cloud-pubsub
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-969565-28811/root/chroot_tmpdir/scmroot/python-google-cloud-pubsub'...
$ git fetch origin a77960d4454bd9c336f219bd3707cdffec6e9154:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-google-cloud-pubsub
 * [new ref]         a77960d4454bd9c336f219bd3707cdffec6e9154 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a77960d Update to 2.14.1