Git Submodules not cloned if not present on default branch

1. Create a Bamboo build that builds for both develop and feature/XYZ
2. Enable git submodule support for the repo in Bamboo
3. Create a feature/XYZ branch in your repo and add a new submodule
4. Bamboo builds feature/XYZ but fails because the Git submodule folder is empty (it's contents are not cloned)

There are couple of ways this can be solved:

A. If submodules are enabled for the repo, Bamboo should make sure to initialise & update all submodules after switching branches
B. Bamboo can clone down the branch directly with both --branch and --recursive flags, this will make sure the submodules for that branch are initialized and cloned