You need git with LFS support. You can find instructions on the Internet, e.g. from here: https://git-lfs.github.com/
Get the Unreal Engine from the Epic Launcher. You need Visual Studio, because the project is a C++ project. You can use the community version of Visual Studio from here: https://visualstudio.microsoft.com/downloads/
Clone the project from git-bash:
git clone --recurse-submodules git@github.com:mika314/UE5WichitTest.git
Open the file UE5WichitTest.uproject and let the engine recompile the
code.
LMAO