How did this plane get into this position and orientation?
Option A is out of the question. This would have been a VERY late and unlikely touchdown. Option B is possible, but option C is the correct answer, especially when zooming in: https://www.google.com/maps/@-33.9413253,151.1742231,145m/data=!3m1!1e3 

Judging by the tire marks on the runway (which appear to go left) this is clearly not the first aircraft (an Air China A330 if you wondered) to perform this maneuver.

The reason is clear: taxiway A2 (the high-speed exit just before the runway intersection) appears to be closed for maintenance: https://www.google.com/maps/@-33.9433411,151.17333,205m/data=!3m1!1e3

This is also evident by the following NOTAM:


  Q) YMMM/QMXLC/IV/M /A /000/999/3357S15111E A) YSSY B) 18/09/21 13:00
  C) 18/09/23 19:00 D) DAILY 1300-1900 EXC SAT E) TWY A BTN TWY G AND
  TWY L NOT AVBL DUE WIP TWY A2, TWY A3, TWY A4, TWY B5, TWY B6, TWY B7
  AND TWY B9 NOT AVBL TWY B3, TWY B4, TWY K AND TWY B8 BTN RWY 16R/34L
  AND TWY B NOT AVBL TWY H BTN TWY Y AND TWY A NOT AVBL TWY J MAX 52M
  WINGSPAN TWY B BTN TWY G AND TWY B10 MAX 36M WINGSPAN REFER METHOD OF
  WORKING PLAN 17/003