VCS can be used to clone multiple projects from a list of repositories.
To install, run
sudo apt install python3-vcstool- Create 
YAMLtype file to list repositores. See repos.yml - Clone the content
 
mkdir -p vcs_tool_example_ws/src
wget https://raw.githubusercontent.com/h2020faros/vcs_tool_example/main/repos.yml -P vcs_tool_example_ws
vcs import vcs_tool_example_ws/src < vcs_tool_example_ws/repos.yml- Check everything got cloned
 
ls vcs_tool_example_ws/src- Possibly install dependencies via rosdep
 
cd vcs_tool_example_ws
rosdep install --from-paths src --ignore-src -r -y- Build
 
colcon build