$ git clone -n https://src.fedoraproject.org/rpms/python-google-cloud-bigtable.git /var/lib/mock/f38-build-side-42-init-devel-774714-27773/root/chroot_tmpdir/scmroot/python-google-cloud-bigtable
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-774714-27773/root/chroot_tmpdir/scmroot/python-google-cloud-bigtable'...
$ git fetch origin 81273a9508108d4e4064102ba53484693d65f1bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-google-cloud-bigtable
 * [new ref]         81273a9508108d4e4064102ba53484693d65f1bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81273a9 Update to 2.15.0