Why is there a difference between "git worktree add" with checkout and "git checkout&-CodePudding

Two commands that should, according to documentation, do the same thing, have different results, and I do not understand why nor the implication of the difference.

The First Command

git worktree add -d "c:\temp\junk\blah" 209134fc8f

Result:

c:\temp\junk\blah>git status
Not currently on any branch.
nothing to commit, working tree clean

The Second Command

git worktree add -d "c:\temp\junk\blah"
cd "c:\temp\junk\blah"
git checkout 209134fc8f

Result:

c:\temp\junk\blah>git status
HEAD detached at 209134fc8f
nothing to commit, working tree clean

I expected these two commands to give the same status result. They do not. So my questions:

Why do these two commands not have the same status result? Is there a meaningful difference between not being on any branch vs the HEAD being detached on a commit? Both seem to work the same for later commands. I am using "-d" specifically because I do not want to create a new branch for this temporary worktree.

CodePudding user response：

Why do these two commands not have the same status result?

Because git status is too clever for its own good—or maybe for your good.