Wattle fences and retaining walls can easily be built from the leftovers of pruning, or from coppiced wood. This technique is the most basic form of fence construction, having been in use since Neolithic times.
I continually harvest apple, dogwood, willow, and hazelnut wood from designated coppicing trees in my yard, because these local species happen to grow both quickly and straightly. There are a number of “fences in progress” that are built higher every time I go around and maintain trees. Preparing materials is easy: I trim the bases of prunings down to sturdy fence posts of a uniform height and circumference; the rest I trim into flexible pieces for weaving the rest of the fence. The leftovers from all of this are piled up in #hugelkultur mounds. I hammer the posts down 1/3 of their height, and the rest is just simple weaving back and forth, between posts.