Function rehome 

pub fn rehome(
    source: &AutoCommit,
    origin: &Origin,
    from_workspace: &str,
    to_workspace: &str,
    target: &RecordId,
) -> Result<AutoCommit, TransferError>

The destination’s copy of source, read from origin in from_workspace: its whole history, one more change giving it target’s id and to_workspace’s scope, and a record’s origin id kept as provenance. source is not changed.