$ git clone -n https://src.fedoraproject.org/rpms/golang-github-nats-io-nkeys.git /var/lib/mock/f42-build-866499-173926/root/chroot_tmpdir/scmroot/golang-github-nats-io-nkeys
Cloning into '/var/lib/mock/f42-build-866499-173926/root/chroot_tmpdir/scmroot/golang-github-nats-io-nkeys'...
$ git fetch origin 76f9946a4da333f498e94c9cc468e265705ba8af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-nats-io-nkeys
 * [new ref]         76f9946a4da333f498e94c9cc468e265705ba8af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 76f9946 update to v0.4.9, close rhbz#2332324