My friend was in court yesterday for committal hearing and has been refused bail. He’s in the court house holding cells how do I find out what he’s charged with?
Chances are, he won't spend too long in the court cells.
Typically, bail-refused people are only kept in court cells until there's a "bed" in remand (and/or a secure vehicle to transport them) available.
As to what he's been charged with - you pretty much don't have any general right to know.
He can choose to tell you, but he doesn't have to.
Maybe one of his family and/or friends might tell you, but they don't have to.
You could ask the prosecutor, but they certainly don't have to tell you.