possible completion bug with --set-upstream-to=

[Ernesto Alfonso]

Whenever I type the last <TAB> to complete origin/master, as in below:

> git branch --set-upstream-to=orig<TAB>

what I get is:

> git branch origin/master

instead of the expected:

> git branch --set-upstream-to=origin/master

git version and OS:

>git version 2.1.4
>
>Distributor ID:        Debian
>Description:   Debian GNU/Linux 8.7 (jessie)
>Release:       8.7
>Codename:      jessie
>

Thanks,

Ernesto