public static ForkchoiceResult withIgnoreUpdateToOldHead(final BlockHeader oldHead) {
      return new ForkchoiceResult(
          IGNORE_UPDATE_TO_OLD_HEAD,
          Optional.empty(),
          Optional.empty(),
          Optional.empty(),
          Optional.of(oldHead.getHash()));
    }
Create forkchoice result with ignore update to old head.

@param oldHead the old head
@return the forkchoice result
consensus/merge/src/main/java/org/hyperledger/besu/consensus/merge/blockcreation/MergeMiningCoordinator.java