Need to get all items from a specific group

Hi
Having boards with groups including more than 500 items - I’m looking for the right way to pull all items from a specific group all at once (I know ‘limit’ argument must be 500 maximum).
If not possible at once than I should build a loop which is pulling the data as chunks, and I would like to know if ther’s a convenient way to do so without pulling the same items each iteration.
Thanks!