diff --git a/pkgs/build-support/fetchgit/default.nix b/pkgs/build-support/fetchgit/default.nix
index 45c7599b1c74e..50cbe03a7aab9 100644
--- a/pkgs/build-support/fetchgit/default.nix
+++ b/pkgs/build-support/fetchgit/default.nix
@@ -68,6 +68,8 @@ lib.makeOverridable (
       rootDir ? "",
       # GIT_CONFIG_GLOBAL (as a file)
       gitConfigFile ? config.gitConfigFile,
+      # Passthrough attributes
+      passthru ? { },
     }:
 
     /*
@@ -195,7 +197,8 @@ lib.makeOverridable (
         passthru = {
           gitRepoUrl = url;
           inherit tag;
-        };
+        }
+        // passthru;
       }
   )
 )
diff --git a/pkgs/build-support/fetchgithub/default.nix b/pkgs/build-support/fetchgithub/default.nix
index dfe210f32c412..5cf84bc623bb3 100644
--- a/pkgs/build-support/fetchgithub/default.nix
+++ b/pkgs/build-support/fetchgithub/default.nix
@@ -124,6 +124,16 @@ lib.makeOverridable (
               fetchLFS
               ;
             url = gitRepoUrl;
+            passthru = (args.passthru or { }) // {
+              inherit
+                gitRepoUrl
+                owner
+                repo
+                tag
+                ;
+              rev = revWithTag;
+            };
+            meta = newMeta;
           }
           // lib.optionalAttrs (leaveDotGit != null) { inherit leaveDotGit; }
         else
@@ -146,9 +156,16 @@ lib.makeOverridable (
                 "${baseUrl}/archive/${revWithTag}.tar.gz";
             extension = "tar.gz";
 
-            passthru = {
-              inherit gitRepoUrl;
+            passthru = (args.passthru or { }) // {
+              inherit
+                gitRepoUrl
+                owner
+                repo
+                tag
+                ;
+              rev = revWithTag;
             };
+            meta = newMeta;
           }
       )
       // privateAttrs