$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-data-accessor.git /var/lib/mock/f39-build-2225574-52846/root/chroot_tmpdir/scmroot/ghc-data-accessor
Cloning into '/var/lib/mock/f39-build-2225574-52846/root/chroot_tmpdir/scmroot/ghc-data-accessor'...
$ git fetch origin 164385f540b3b79b3d956ce926158af8c2c1e7f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-data-accessor
 * [new ref]         164385f540b3b79b3d956ce926158af8c2c1e7f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 164385f rv64 rebuild