Binary package “git-email” in ubuntu xenial

fast, scalable, distributed revision control system (email add-on)

 Git is popular version control system designed to handle very large
 projects with speed and efficiency; it is used for many high profile
 open source projects, most notably the Linux kernel.
 Git falls in the category of distributed source code management tools.
 Every Git working directory is a full-fledged repository with full
 revision tracking capabilities, not dependent on network access or a
 central server.
 This package provides the git-send-email program for sending series of
 patch emails.