How to pull all git repositories in a single project

Background/Situation

When working in a multi-root project (which has multiple git repositories), sometimes it is required to fetch/pull all of the repositories in the project in one single command.

Question

How to pull all git repositories in one project in the IDE?

Answer

I can be done via the Update Project.. action in the Branches (VCS) widget: https://www.jetbrains.com/help/idea/sync-with-a-remote-repository.html#update.