The link I posted earlier Song With No Boss, and Purrumpa is a podcast which goes for an hour but only the first part is about the Wanji-wanji song. The presenter says at the beginning that it is the first part of a five part story.

The song starts at about 3 mins 40 and stops a minute or two later but there is talking over it. You'll hear a bit of it but not all of it. The song is introduced by the late great Archie Roach.