scsh: switch to fetchFromGitHub

pkgs/development/interpreters/scsh/default.nix

···
-{ lib, stdenv, fetchgit, autoreconfHook, scheme48 }:
+{ lib, stdenv, fetchFromGitHub, autoreconfHook, scheme48 }:
 
 stdenv.mkDerivation {
   pname = "scsh";
   version = "0.7pre";
 
-  src = fetchgit {
-    url = "https://github.com/scheme/scsh.git";
+  src = fetchFromGitHub {
+    owner = "scheme";
+    repo = "scsh";
     rev = "f99b8c5293628cfeaeb792019072e3a96841104f";
+    sha256 = "sha256-vcVtqoUhozdJq1beUN8/rcI2qOJYUN+0CPSiDWGCIjI=";
     fetchSubmodules = true;
-    sha256 = "0ci2h9hhv8pl12sdyl2qwal3dhmd7zgm1pjnmd4kg8r1hnm6vidx";
   };
 
   nativeBuildInputs = [ autoreconfHook ];