$ git checkout -b <branch> --track <remote>/<branch>
------------
+
+If the branch exists in multiple remotes and one of them is named by
+the `checkout.defaultRemote` configuration variable, we'll use that
+one for the purposes of disambiguation, even if the `<branch>` isn't
+unique across all remotes. Set it to
+e.g. `checkout.defaultRemote=origin` to always checkout remote
+branches from there if `<branch>` is ambiguous but exists on the
+'origin' remote. See also `checkout.defaultRemote` in
+linkgit:git-config[1].
++
You could omit <branch>, in which case the command degenerates to
"check out the current branch", which is a glorified no-op with
rather expensive side-effects to show only the tracking information,
commits, one of them tagged, and with branch 'master' checked out:
------------
- HEAD (refers to branch 'master')
- |
- v
+ HEAD (refers to branch 'master')
+ |
+ v
a---b---c branch 'master' (refers to commit 'c')
^
|
------------
$ edit; git add; git commit
- HEAD (refers to branch 'master')
- |
- v
+ HEAD (refers to branch 'master')
+ |
+ v
a---b---c---d branch 'master' (refers to commit 'd')
^
|
------------
$ git checkout master
- HEAD (refers to branch 'master')
+ HEAD (refers to branch 'master')
e---f |
/ v
a---b---c---d branch 'master' (refers to commit 'd')