$ git clone -n https://src.fedoraproject.org/rpms/python-etcd3gw.git /var/lib/mock/f40-build-2058915-49153/root/chroot_tmpdir/scmroot/python-etcd3gw
Cloning into '/var/lib/mock/f40-build-2058915-49153/root/chroot_tmpdir/scmroot/python-etcd3gw'...
$ git fetch origin ff9b4b199cf04d752e4786ad40e3bae1e132b028:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-etcd3gw
 * [new ref]         ff9b4b199cf04d752e4786ad40e3bae1e132b028 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff9b4b1 New upstream version 2.3.0 (rhbz#2254543)