1 files changed, 21 insertions, 0 deletions
diff --git a/src/libfetchers/github.cc b/src/libfetchers/github.cc
index 8675a5a66..c01917dcc 100644
--- a/src/libfetchers/github.cc
+++ b/src/libfetchers/github.cc
@@ -64,6 +64,13 @@ struct GitHubInput : Input
         return attrs;
     }
 
+    void clone(const Path & destDir) const override
+    {
+        std::shared_ptr<const Input> input = inputFromURL(fmt("git+ssh://git@github.com/%s/%s.git", owner, repo));
+        input = input->applyOverrides(ref.value_or("master"), rev);
+        input->clone(destDir);
+    }
+
     std::pair<Tree, std::shared_ptr<const Input>> fetchTreeInternal(nix::ref<Store> store) const override
     {
         auto rev = this->rev;
@@ -126,6 +133,20 @@ struct GitHubInput : Input
 
         return {std::move(tree), input};
     }
+
+    std::shared_ptr<const Input> applyOverrides(
+        std::optional<std::string> ref,
+        std::optional<Hash> rev) const override
+    {
+        if (!ref && !rev) return shared_from_this();
+
+        auto res = std::make_shared<GitHubInput>(*this);
+
+        if (ref) res->ref = ref;
+        if (rev) res->rev = rev;
+
+        return res;
+    }
 };
 
 struct GitHubInputScheme : InputScheme