JetBrains IDEs (such as IntelliJ IDEA, PyCharm, WebStorm, PhpStorm, RubyMine, and others) ship with a Git Integration plugin. It provides a dedicated view in the IDE to work with Git and GitHub Pull Requests.
Figure 1. Version Control ToolWindow in JetBrains IDEs.
The integration relies on the command-line git client, and requires one to be installed. The official documentation is available at https://www.jetbrains.com/help/idea/using-git-integration.html.