How to 'git remote add' and track a branch in the same filesystem

Question

I have 2 local git archives in /a and in /b which were cloned from remotes/origin.

There is a new branch z on /b

How can I track and fetch branch z from archive

Answer 1

I don't think you can do that.

I think you'll need to push branch z to origin in b and fetch it from a.

cd /b
git push origin z

That last command pushes local branch z to remote (so pushing z -> origin/z)

then you can track it locally in repo a:

cd /a
git checkout -b z origin/z

That last command creates (and checks out) a local branch z that tracks origin/z