Where does git store the last checked out branch?

2018-07-03 10:45:23

When I do git checkout - , git checks out the last branch I had checked out. Where is that information stored?

It scans .git/logs/HEAD (the reflog for HEAD ) for the last line looking like :

checkout: moving from <branchA> to <branchB>

the "last branch" is branchA

As said in the post linked by @SergioTulentsev :

git checkout - is a shorthand for git checkout @{-1} .

@{-1} is the branchA of the last checkout: ... line

@{-2} is the branchA of the previous to last checkout: ... line

etc ...

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