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This is really great!

I'd suggest one edit in the first entry:

“heads” are “branches” --> a "head" is the end of any given "branch"

This makes it a little clearer when talking about detached head state, since switching to a commit on a branch can still leave you detached.

I was confused by that when I got to your detached head description, so I double-checked.

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That’s not quite right is it? HEAD is simply a pointer to whatever commit is currently on disk.

HEAD can point to a commit that is the end of a branch (typical state, HEAD is “attached”), but it can also point to one that isn’t (HEAD is “detached”).

correct, but I was referring to lowercase "head".

Ha. Right you are

> “heads” are “branches” --> a "head" is the end of any given "branch"

and throw "tip" in there, as in "HEAD is the tip of the current branch".

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