Missing 'bin/' directory after cloning the WR_Plotter repository

[alpana-hep]

1. I am setting everything at UMN
2. When I follow - any of these steps

git clone --recursive git@github.com:UMN-CMS/WrCoffea.git
git submodule update --init --recursive

The 'bin/' directory and the requirement.txt file do not show up in the working area.
The other scripts are also not upto date. On github, it shows src.plotting_helpers has a function named 'plot_stack' but when I clone it using above methods, the scripts are not yet updated.
But if I git clone this particular directory - then it gives me everything in the updated version

2. Why do we need to execute the following lines

cd WR_Plotter
git checkout -b branch_name
git push -u origin branch_name

3. Also if I am using ROOT on UMN, it automatically ask for older version of coffea. AFAIU, the coffea version should not matter while creating plots?

python3 -m pip install -r requirements.txt

Good news - it works if I clone this repository independently.