govers: switch to fetchFromGitHub

pkgs/development/tools/govers/default.nix

···
-{ lib, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "govers";
-  version = "20160623-${lib.strings.substring 0 7 rev}";
-  rev = "77fd787551fc5e7ae30696e009e334d52d2d3a43";
+  version = "unstable-2016-06-23";
 
   goPackagePath = "github.com/rogpeppe/govers";
 
-  src = fetchgit {
-    inherit rev;
-    url = "https://github.com/rogpeppe/govers";
-    sha256 = "12w83vyi8mgn48fwdm2js693qcydimxapg8rk0yf01w0ab03r5wn";
+  src = fetchFromGitHub {
+    owner = "rogpeppe";
+    repo = "govers";
+    rev = "77fd787551fc5e7ae30696e009e334d52d2d3a43";
+    sha256 = "sha256-lpc8wFKAB+A8mBm9q3qNzTM8ktFS1MYdIvZVFP0eiIs=";
   };
 
   dontRenameImports = true;