It doesn't say how it got that name. Do you suppose it's because it resembles the crosswise cuts you make, when chopping up meat to make hash?

I thought it was a corruption, or perhaps variation, of hatch; as in cross-hatch.

hatch
tr.v. hatched, hatch·ing, hatch·es
To shade by drawing or etching fine parallel or crossed lines on.
n.
A fine line used in hatching.