$ git clone -n https://src.fedoraproject.org/rpms/golang-github-nats-io.git /var/lib/mock/f41-build-side-1-3049993-37944/root/chroot_tmpdir/scmroot/golang-github-nats-io
Cloning into '/var/lib/mock/f41-build-side-1-3049993-37944/root/chroot_tmpdir/scmroot/golang-github-nats-io'...
$ git fetch origin ef4d0e6366e40ea5d91ea44c5549ddb3848a626f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-nats-io
 * [new ref]         ef4d0e6366e40ea5d91ea44c5549ddb3848a626f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef4d0e6 Update to 1.37.0 upstream release