∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] (f : CategoryTheory.Arrow C)
  [inst_1 : ∀ (n : ℕ), CategoryTheory.Limits.HasWidePushout f.left (fun x => f.right) fun x => f.hom],
  f.augmentedCechConerve.left = f.left