I believe I made some progress after including "myRepo" as a submodule, however now I am running into this:
Including module: in path: /home/stan/projects/projectRed/myRepo
CMake Error at /home/stan/projects/projectRed/nrfConnectCore/zephyr/CMakeLists.txt:604 (add_subdirectory):
The binary directory
/home/stan/projects/projectRed/myRepo/samples/tmp116/build/zephyr
is already used to build a source directory. It cannot be used to build
source directory
/home/stan/projects/projectRed/myRepo
Specify a unique binary directory name.