Failed to fork

Failed to fork
git ["rev-parse", "HEAD"] failed: fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git [...] -- [...]'

---
| Field | Value |
| --- | --- |
| App version | 1.0.22 |
| OS | Windows 10.0.19045 |
| Theme | GitHub |
| Path | /workflows |
| Tenure | Day 5 (Week 1) |

Start by reproducing the fork from the /workflows path in GitHub App 1.0.22 on Windows 10, focusing on the reported `git rev-parse HEAD` failure. Trace the fork operation's handling of the repository state and verify that forking no longer fails with the ambiguous `HEAD` error.

索引モデルが issue の本文から書いたものです。