$ git clone -n https://src.fedoraproject.org/rpms/python-google-cloud-iam.git /var/lib/mock/f38-build-side-42-init-devel-961467-28791/root/chroot_tmpdir/scmroot/python-google-cloud-iam
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-961467-28791/root/chroot_tmpdir/scmroot/python-google-cloud-iam'...
$ git fetch origin 07b30f7af31a6094c383838028409b4e1d8484f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-google-cloud-iam
 * [new ref]         07b30f7af31a6094c383838028409b4e1d8484f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 07b30f7 Update to 2.12.0 rhbz#2182136