$ git clone -n https://src.fedoraproject.org/rpms/ghc-hackage-security.git /var/lib/mock/f40-build-2193667-51481/root/chroot_tmpdir/scmroot/ghc-hackage-security
Cloning into '/var/lib/mock/f40-build-2193667-51481/root/chroot_tmpdir/scmroot/ghc-hackage-security'...
$ git fetch origin d9dd374d6dbd467e99f013dc024b90e385fa966f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hackage-security
 * [new ref]         d9dd374d6dbd467e99f013dc024b90e385fa966f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d9dd374 bump release