When set, it will recursively fetch all submodules.
If any submodule uses a SSH URL (i.e. git@github.com:ORG/REPO.git), it will be replaced with a HTTPS one (i.e. https://github.com/ORG/REPO.git) so that token authentication can be used to clone private repositories.
Any public Git repository should work (i.e. those not hosted on Github).
git@github.com:ORG/REPO.git), it will be replaced with a HTTPS one (i.e.https://github.com/ORG/REPO.git) so that token authentication can be used to clone private repositories.