WTF is a detached HEAD in git?

Git Pull vs Fetch: When To Use Each Git branches and Git HEAD: 55 What is HEAD in Git Git Fetch vs Git Pull? Which one should you choose? Learn Git Essentials 9: Head & Detached Head Understanding git fetch through visualization Никогда* не используйте git pull Learn Git 08: The Head Pointer and Commit Chain Git MERGE против REBASE: всё, что нужно знать Git Internals: Demystifying References, Branches & HEAD Learn Git from Scratch - Fetch and Pull from Origin Basics of Git - Part 5 - How the HEAD Works Git HEAD Explained: Understanding the Current Branch Pointer Как работает Git: объяснение за 4 минуты 'Git Pull' vs. 'Git Fetch': Key Differences Explained Git Detached HEAD Explained: Causes, Dangers & How to Fix It Git CLONE, PUSH & FETCH Tutorial