Even if you point a 747 vertically upwards the wing gear is nowhere near 4 metres above the body gear. From the side, on the ground, each pair of bogies looks like this: OOOO no overlap but not much of a fore/aft gap.
And at 150 kts flying basically level they would make a big hole, not dainty little 3-inch ruts like a Chelsea tractor might.
The Canadians state "the tail hit the berm". No mention of gear. At a high angle of attack, tail close to the ground, I reckon the gear would clear the berm.
TP