$ git clone -n https://src.fedoraproject.org/rpms/golang-github-nats-io.git /var/lib/mock/f39-build-1647663-40438/root/chroot_tmpdir/scmroot/golang-github-nats-io
Cloning into '/var/lib/mock/f39-build-1647663-40438/root/chroot_tmpdir/scmroot/golang-github-nats-io'...
$ git fetch origin f48830c34cd4b97dfea3380583d9637aeb389f99:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-nats-io
 * [new ref]         f48830c34cd4b97dfea3380583d9637aeb389f99 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f48830c update to v1.30.1, close rhbz#2240140