NixOS/nixpkgs — pull request #3650 by bennofs (2014-08-17 21:05:09+00:00)
Title: prefetch-git: output human-readable rev to stderr

that way, the stdout stays compatible with nix-prefetch-{bzr,svn,hg}.

if stderr is not the right place for this kind of information, we could also use an environment variable to control output of the human readable rev.