replace fetchGit with pkgs.fetchgit

pkgs/iot-data/default.nix

@@ -1,14 +1,15 @@
 {
+  pkgs,
   buildPythonPackage,
   flask,
   python3,
 }:
 
 let
-  src = fetchGit {
+  src = pkgs.fetchgit {
     url = "https://git.clerie.de/clerie/iot-data.git";
-    ref = "main";
     rev = "f60e3a3f89549b4ce88df20888c08a01062d086a";
+    sha256 = "sha256-D8wusJfYbOkL/Nq6yfYBvhnkBmRcDktORicUpDsIrUE=";
   };
   pname = "iot-data";
   version = "0.0.1";

pkgs/uptimestatus/default.nix

@@ -1,4 +1,5 @@
 {
+  pkgs,
   buildPythonPackage,
   flask,
   requests,
@@ -6,10 +7,10 @@
 }:
 
 let
-  src = fetchGit {
+  src = pkgs.fetchgit {
     url = "https://git.clerie.de/clerie/uptime-status.git";
-    ref = "main";
     rev = "caacaced97617838bbd9b7b91a4e3d06e411139b";
+    sha256 = "sha256-qVvUZ+j2JnG26Fl/UcfpjY30RQjAPqCCwbxtz/+r/dU=";
   };
   pname = "uptimestatus";
   version = "0.0.1";

pkgs/wetter/default.nix

@@ -1,4 +1,5 @@
 {
+  pkgs,
   buildPythonPackage,
   flask,
   flask_sqlalchemy,
@@ -7,7 +8,6 @@
   yarn2nix-moretea,
   nodejs,
   pkg-config,
-  pkgs,
   psycopg2,
   python3,
   stdenv,
@@ -16,10 +16,10 @@
 }:
 
 let
-  src = fetchGit {
+  src = pkgs.fetchgit {
     url = "https://git.clerie.de/clerie/wetter.git";
-    ref = "master";
     rev = "3193c6d507af5d6f5d62c23046b7fbf0c638ddb4";
+    sha256 = "sha256-ouUmmw020jKg/SRlYhGBFRw/atxW+atQ1JSTFQNi5iw=";
   };
   pname = "wetter";
   version = "0.0.1";