$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-bitarray.git /var/lib/mock/f39-build-2225390-52824/root/chroot_tmpdir/scmroot/ghc-bitarray
Cloning into '/var/lib/mock/f39-build-2225390-52824/root/chroot_tmpdir/scmroot/ghc-bitarray'...
$ git fetch origin 479aaf54d2981512b8d9d9a99a9614a8397a4876:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-bitarray
 * [new ref]         479aaf54d2981512b8d9d9a99a9614a8397a4876 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 479aaf5 rv64 rebuild