<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/137876>137876</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Possible hung git invocation causing presubmit failures
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          Prabhuk
      </td>
    </tr>
</table>

<pre>
    Running into the following failure when uploading new PRs or updating existing PRs at times.

```
Running 'git gc'...
  | error: cannot lock ref 'refs/remotes/origin/users/matthias-springer/cse_filter': Unable to create '/var/lib/buildkite-agent/builds/service-855b8ffd5d-k7cg6-1/llvm-project/github-pull-requests/.git/refs/remotes/origin/users/matthias-springer/cse_filter.lock': File exists.
  |  

<br class="Apple-interchange-newline">
```

Links to two separate failing instances:

https://buildkite.com/llvm-project/github-pull-requests/builds/173742#01968337-b887-4d3e-99d9-6f5c9c3af89d

https://buildkite.com/llvm-project/github-pull-requests/builds/173749#0196834c-83a2-4bbe-b9c2-038795ea088f
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJy0lD-P7CYQwD8NbhCWDfYChYvNXbZKcXpS6gjw2CbLgsOf3eTbR3jvTi-XJlL0JBcwzN_fzFilZFcPMKHxJzS-NqrkLcTpLSq9lWujw_zX9K14b_2Krc8B5w3wEpwLjypalHUlAn5s4HHZXVBzFXt44LdvCYeIyz6rXGXwp03HoT6ojLO9QWpRd67fqXv_uvNHNET5ajNeDaK8bQ_FF4rOHUb8BUOMISJ2xkZ5HzJ2wVxxhKVaRVgSopcIt5ChnkK0q_WIXkqCWAU3lfNmVSJpj9avEBG9mAS_LdbleuHV869eaQc4B2wiqAzVNaKXu6razmpEL7pYN19tBqJW8PlDUkMkiHdrgIhx1GJZ5nEmV27WE-mrtbvfyB7D72Cq0WrzVjTZi3Mkwh8FUq4u2tXmo47_V05b2bzXdLEOno1IX4A-j-_dYC86YuNUSoi9IkrP--6AWJ8hmk35FYiHh7MeEKWI_fylgag7_2L9NVV0-RFwgl3FCrAOy3OOUlbeQELs_NTfct6PG718j7U14fafcX2i7znjA0WUdb08CcY40UJwMswMiJSzJKdlNNIwtQg5_6j48jP-YIhgipJBayBaGko6JrgcQXVCLM08sVkyqRqYej6McpRiHJptOp2k7nkvxMB6aQTvqZk1G8TMQDGjdGMn2tGxG6ik3diNQzuPahjGfgHF-TIvAxo6uCnr2pp_G-La2JQKTD3jgp8apzS4dOw9pXVhj9fa0fG1idNRtC5rQkPnjoH5dJNtdjC9hZRs3ZCt-BXXVbX-HozKNnhsVEm11XuEVPTN5o8_RWpKdNM_eT-Bfgf738yP3A64z-TvE_07AAD__8ZJhf0">