$ git clone -n https://src.fedoraproject.org/rpms/golang-github-nats-io-stan.git /var/lib/mock/f40-build-2198858-51712/root/chroot_tmpdir/scmroot/golang-github-nats-io-stan
Cloning into '/var/lib/mock/f40-build-2198858-51712/root/chroot_tmpdir/scmroot/golang-github-nats-io-stan'...
$ git fetch origin ae15f3a0e17a785c45808bac77e54dcabe758a7e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-nats-io-stan
 * [new ref]         ae15f3a0e17a785c45808bac77e54dcabe758a7e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae15f3a  bump to v0.10.4, close rhbz#1963443