git-new: Cannot determine upstream remote

[rec]

g new -r 589ab23 debug -v
$ git diff-index --quiet HEAD --
$ git branch --format=%(refname:short)
> master
$ git remote
> origin
$ git fetch origin
$ git branch --format=%(refname:short) -r
> origin/HEAD
> origin/master
$ git rev-parse --abbrev-ref --symbolic-full-name @{u}
> origin/master
$ git symbolic-ref -q --short HEAD
> master
ERROR: git-new: Cannot determine upstream remote