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Fix Docker Build Context Canceled by Excluding Files - How to Fix the Git index.lock File Exists Error-How to Fix Git Detached HEAD and Checkout a Branch

2026-07-28 14:51:04macos-help

Fix Docker Build Context Canceled by Excluding Files - How to Fix the Git index.lock File Exists Error-How to Fix Git Detached HEAD and Checkout a Branch

Final checklist

Confirm that the same symptom is gone after a restart or refresh.
Keep the smallest working change and undo temporary diagnostic settings.