git-cola software package provides highly caffeinated git GUI, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install git-cola
git-cola is installed in your system.
Make ensure the git-cola package were installed using the commands given below,
$ sudo dpkg-query -l | grep git-cola *
You will get with git-cola package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Version Control Systems |
| Package | git-cola |
| Version | 2.8-1 |
| Description | highly caffeinated git GUI |
| Sub Section | vcs |