There is no shortcut or way to fudge this one that I know of at the time of writing this.
Start a game in full 18 mode and do your absolute best. Make sure to try and save a mulligan or two just in case you mess up at the end. Get to the 18th and final hole under par, now keep taking little baby strokes so that you intentionally miss the hole. Keep checking your total stokes for the game by holding the grip buttons. Make sure you stay as close to the hole as possible to make your final shot easier. Finally, when you are 1 under par for the match sink the last shot (use the mulligans you saved if you mess up) and there you have it.