Return Set Ordered By Physical Order Of Rows?

I would like to do a SELECT query and have the return set ordered by the order which the rows are physically stored in the table.

Specifically, something like:

Select a.*, b.normalizedColumn
FROM table a
JOIN table b
(a.id = b.id)
ORDER BY "Physical order of table a rows"

I believe if there is a clustered index on the table, I can just order by that index and it SHOULD be the physical order of the table.

(I would like to see this as I am generating mock data and would like to verify the "randomness" of the data inserted).