fix

Author: filipchristiansen

src/gitingest/utils/git_utils.py

@@ -215,24 +215,38 @@ async def fetch_remote_branches_or_tags(url: str, *, ref_type: str, token: str |
         If the ``ref_type`` parameter is not "branches" or "tags".
 
     """
+    if ref_type not in ("branches", "tags"):
+        msg = f"Invalid fetch type: {ref_type}"
+        raise ValueError(msg)
+
     cmd = ["git"]
 
     # Add authentication if needed
     if token and is_github_host(url):
         cmd += ["-c", create_git_auth_header(token, url=url)]
 
-    cmd += ["ls-remote", "--heads", url]
+    cmd += ["ls-remote"]
+
+    fetch_tags = ref_type == "tags"
+    to_fetch = "tags" if fetch_tags else "heads"
+
+    cmd += [f"--{to_fetch}"]
+
+    # `--refs` filters out the peeled tag objects (those ending with "^{}") (for tags)
+    if fetch_tags:
+        cmd += ["--refs"]
+
+    cmd += [url]
 
     await ensure_git_installed()
     stdout, _ = await run_command(*cmd)
-
     # For each line in the output:
     # - Skip empty lines and lines that don't contain "refs/{to_fetch}/"
     # - Extract the branch or tag name after "refs/{to_fetch}/"
     return [
-        line.split("refs/heads/", 1)[1]
+        line.split(f"refs/{to_fetch}/", 1)[1]
         for line in stdout.decode().splitlines()
-        if line.strip() and "refs/heads/" in line
+        if line.strip() and f"refs/{to_fetch}/" in line
     ]