$ git clone -n https://src.fedoraproject.org/rpms/python-zmq.git /var/lib/mock/f42-build-3408476-45145/root/chroot_tmpdir/scmroot/python-zmq
Cloning into '/var/lib/mock/f42-build-3408476-45145/root/chroot_tmpdir/scmroot/python-zmq'...
$ git fetch origin 315a04fce382407d63d11cae479e0278de6ed38e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-zmq
 * [new ref]         315a04fce382407d63d11cae479e0278de6ed38e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 315a04f Update to 26.3.0 (close RHBZ#2351542)