Add ability to reset branch to remote

On occasion, we end up with divergent branches in our lowest shared/deployed environment. it is really cumbersome to have to drop to the OS to issue a `git reset --hard` command (in part because permissions on the OS are really restrictive). Ideally, it would do a git-fetch followed by the reset.

It would be nice if this were an option somewhere within the UI to reset the current branch to it's `origin` counterpart: either an action button when you select a local branch or maybe an input that lets you run git commands from the settings page (you could show it only in expert mode)

This is more of a convenience request than anything else.

Comienza localizando el punto de entrada de la UI para seleccionar ramas locales y las acciones existentes de fetch o de ramas. Determina cómo se puede exponer de forma segura un reset al equivalente de la rama en origin y, después, verifica que fetch y reset produzcan el estado esperado de la rama en el entorno compartido.

Escrito por el modelo de indexación a partir del texto del issue.