All I can find is that it is referenced as being a fake story made up in ~1997 which spread as the internet became more accessible worldwide. In 2008 it got a big kick in popularity after the Alan Jones Show was sent it by a listener and he read it on air as if it were real, but after a few minutes the producer told him they were informed that it wasn't real and they apologized to General Cosgrove.
Here is audio of the 2008 broadcast and the page I found talking about it:
Major General Peter Cosgrove https://www.abc.net.au/mediawatch/episodes/get-it-right-listeners/9975304 https://web.archive.org/web/20201112021514/https://www.abc.net.au/mediawatch/episodes/get-it-right-listeners/9975304 https://archive.ph/4ZL2l
Audio https://www.abc.net.au/mediawatch/transcripts/0813_jones1.mp3 https://web.archive.org/web/20201203140339/https://www.abc.net.au/mediawatch/transcripts/0813_jones1.mp3 https://web.archive.org/web/20210409172309/https://files.catbox.moe/9qq7zk.mp3 https://files.catbox.moe/9qq7zk.mp3
Bah. I wish it was real because it was completely accurate and truthful.
(post is archived)