∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.Limits.HasZeroMorphisms C]
  {X Y : C} {f : X ⟶ Y} (s : CategoryTheory.Limits.Fork f 0),
  CategoryTheory.CategoryStruct.comp s.ι f = CategoryTheory.CategoryStruct.comp s.ι 0