The site you linked to explains why "past" is correct IMO:
"To pass often means to move past, and this is where confusion can arise. Of note, to pass can also mean to sail past, to fly past, to run past, to hop past, etc. - the method of moving is irrelevant. This is worth bearing in mind, because if you have used a verb indicating motion already, then it will be partnered with past and not passed."
The verb here would be "get". See the examples at the bottom for use as a preposition.
possible, I'm much less sure about my use of passed versus past here then the use of which instead of that in the title. That said, I had thought 'get' did not indicate motion across the sentence here 'passed' did, so passed is correct. But I could totally believe I'm doing it wrong.
"To pass often means to move past, and this is where confusion can arise. Of note, to pass can also mean to sail past, to fly past, to run past, to hop past, etc. - the method of moving is irrelevant. This is worth bearing in mind, because if you have used a verb indicating motion already, then it will be partnered with past and not passed."
The verb here would be "get". See the examples at the bottom for use as a preposition.
Or did I now fuck it up again? ;)