$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-half.git /var/lib/mock/f39-build-2211686-52229/root/chroot_tmpdir/scmroot/ghc-half
Cloning into '/var/lib/mock/f39-build-2211686-52229/root/chroot_tmpdir/scmroot/ghc-half'...
$ git fetch origin e8ba4f5a001b033db0bd46f5bc8e2c644bf799cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-half
 * [new ref]         e8ba4f5a001b033db0bd46f5bc8e2c644bf799cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e8ba4f5 rv64 rebuild