Pull the starter, flywheel lock.
Here are two ways it can be done, but I dont recommened.
Put breaker and socket on car, align properly, with ebrake on (and front wheels off) lower car on breaker (using the weight of the car to break it free).
Wedge breaking against something that wont dent or be damaged, use starter.
Again, NOT recommended, but those are two options (that I’ve NEVER had to use).