getGenesisHash RPC Method

curl https://api.devnet.solana.com -s -X POST -H "Content-Type: application/json" -d '
  {"jsonrpc":"2.0","id":1, "method":"getGenesisHash"}
'

{
  "jsonrpc": "2.0",
  "result": "GH7ome3EiwEr7tu9JuTh2dpYWBJK3z69Xm1ZE3MEE6JC",
  "id": 1
}