When you're too lazy to do it by hand.
These are the world's laziest hatching brushes. They all change color, aside from the blender of course.
I was originally thinking of making fishnet brushes, but decided against it and repurposed it into these. The "Diamond Netting Stretch" can still be used like fishnet leggings/shirt, and changes thickness based on pressure. The lines brush can also be used for stripes and patterns on clothes.
Two of the brushes are simple fill brushes. All you have to do is change the angle to get a neat, even hatch.
Lastly, there's a blender brush for fun blended looks:
too sleepy to hatch