$ git clone -n https://src.fedoraproject.org/rpms/golang-github-nats-io.git /var/lib/mock/f40-build-2254152-54223/root/chroot_tmpdir/scmroot/golang-github-nats-io
Cloning into '/var/lib/mock/f40-build-2254152-54223/root/chroot_tmpdir/scmroot/golang-github-nats-io'...
$ git fetch origin 6331f826ac01e2e88c1a7e5a3c2401af50c50866:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-nats-io
 * [new ref]         6331f826ac01e2e88c1a7e5a3c2401af50c50866 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6331f82 update to v1.32.0, close rhbz#2258225