fetchTree: Implicitly set __final = true when a narHash is supplied#297

edolstra merged 2 commits intomainDeterminateSystems/nix-src:mainfrom

eelcodolstra/fh-1214-make-fetchtree-finalDeterminateSystems/nix-src:eelcodolstra/fh-1214-make-fetchtree-finalCopy head branch name to clipboard