git command to emit name of remote tracking branch

Question

I'd like a command that emits the name of the tracked branch for the branch I'm on. Something like:

$ git checkout --track -b topic origin/master
Branch topic set up to track remote branch master from origin.
Switched to a new branch 'topic'
$ git unknown-command
origin/master

Is there such a command?

Answer 1

Will emit the remote being tracked:

git config branch.<branchname>.remote

Will emit the ref being tracked on that remote:

git config branch.<branchname>.merge

I don't believe that there is a combined command that will emit both together (at least within normal Git; you could always make your own).

---

For example, for a local master branch:

$ git config branch.master.remote
origin
$ git config branch.master.merge
refs/heads/master

Answer 2

git config --global alias.show-upstream '!sh -c '\''

    test -n "$1" || set -- HEAD
    set -- "$(git rev-parse --symbolic-full-name "$1")"
    git for-each-ref --format="%(upstream:short)" "$1"


'\'' -'

git show_upstream
git show_upstream HEAD
git show_upstream some/local/branch