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How to Fix Git Detached HEAD and Checkout a Branch - How to Fix 'Git Remote Origin Already Exists' Error When Cloning-Resolve index.lock Exists in Git on Linux

2026-07-28 15:38:43office-tools

How to Fix Git Detached HEAD and Checkout a Branch - How to Fix 'Git Remote Origin Already Exists' Error When Cloning-Resolve index.lock Exists in Git on Linux

Final checklist

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