update HEAD

Author: Andarist

src/test/integration/git.test.ts

@@ -233,6 +233,21 @@ const makeFileChanges = async (
     });
     console.log("[DEBUG makeFileChanges] Commit created:", commitResult);
 
+    // In detached HEAD state, isomorphic-git doesn't update HEAD after commit.
+    // Use writeRef to update HEAD to point to the new commit.
+    await git.writeRef({
+      fs,
+      dir: repoDirectory,
+      ref: "HEAD",
+      value: commitResult,
+      force: true,
+    });
+
+    console.log(
+      "[DEBUG makeFileChanges] Updated HEAD via writeRef to:",
+      commitResult,
+    );
+
     // Verify HEAD was updated
     const headAfterCommit = await git.resolveRef({
       fs,