Here you will find some examples to checkout a documentation, and how to create a branch inside the repository for an application.

Downloading the xfce4-docs repository:

git clone git://git.xfce.org/xfce/xfce4-docs
git clone ssh://<USERNAME>@git.xfce.org/git/xfce/xfce4-docs

Listing local branches:

git branch

Listing local and remote branches:

git branch -a

Checking out a branch for the first time:

git checkout -b <NEW-BRANCH-NAME> --track <BRANCH>

Checking out a local branch:

git checkout <BRANCH>

Creating a new and empty branch:

git checkout --orphan <BRANCH>

Creating a new branch on top of a template:

git checkout -b <NEW-BRANCH-NAME> --track template-guide
git checkout -b <NEW-BRANCH-NAME> --track template-page

Adding new files:

git add [files]
git commit -m"Update documentation: section <FOO>"
git push