HEAD: Where You Are Standing
the you-are-here pin - normally pinned THROUGH a branch name, which is why your branch follows you
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HEAD: Where You Are Standing
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Unlock this course Already purchased? Sign inThe Prompt Shows Where You Stand
every command acts FROM a branch - print that branch before the $ and you always know where you stand
Blobs, Trees, Commits
git stores a snapshot as small objects, and a commit RECORDS it - the commit points at ONE tree, trees name blobs
Content Addressing
an object's id is DERIVED by hashing its bytes - identical content gets the identical name, automatically
A Branch Is Just a Name
a branch is a ref under refs/heads holding ONE commit id - creating one writes a tiny pointer and copies nothing