expected_genesis_hash

raw details (from release v2.2.3):

{
  "name": "expected_genesis_hash",
  "properties": {
    "long": "expected-genesis-hash",
    "value_name": "HASH",
    "takes_value": "true",
    "validator": "hash_validator",
    "help": "Require the genesis have this hash"
  },
  "isDeprecated": false
}