Koepka's hole-in-one at the Grange's 12th hole on Sunday has instantly entered Australian golf folklore.
The perfect 9-iron at the 150m par 3 in the final round of LIV Golf's Australian debut received the perfect response.
"I knew it was good, I thought if anything it was going to be a little deep," Koepka said.
"I saw it pitch in the up-slope and take a soft bounce and I was like, 'Oh, it will be close'.
"And then the roars just kept getting louder and louder and louder.
"When it went in, I started just getting peppered with beer cans. I smelled like beer the whole entire rest of the day.
"It was a wild, crazy experience."
The 12th is dubbed the watering hole, not for natural water but for the copious quantities of alcohol consumed there.
Copying a similar hole at PGA Tour's Phoenix Open, the hole is lined by grandstands and bars with players arriving, and teeing off, to their signature song.
The 29-year-old wanted to change his song for the final round to something very Adelaide: Hilltop Hoods' Nosebleed Section.
But instead, Super Gremlin by Kodak Black pumped as it did for his opening rounds.
"I actually told my caddie, 'Damn, they didn't play my song, I'm pissed'," Koepka said.
His mood soon changed.
"This has been the best tournament I think LIV has had so far," Koepka said.
"And to be able to do that in front of that crowd is pretty special.
"The next couple hours I was out there, I was just getting ovation after ovation every time I walked up to every shot, every tee box.
"That's probably what Cam Smith felt like the entire week but at least I got a glimpse of it."
Koepka finished 24th after carding a six-under for the day to finished at 10-under, nine shots behind winner Talor Gooch.
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