from 1.26.1 the output of cardano-cli query tip --mainnet
$ cardano-cli query tip --mainnet
{
"epoch": 261,
"hash": "81bc4dee50b6385a1d2fc235753c7af223e4ecf3bcb54633eea62d1d57d7283e",
"slot": 27451256,
"block": 5619862
}
the rest is is the same as in the linked post.