Step 1:
git clone https://github.com/wthrajat/Windows-Junk-Cleaner.git
Step 2:
cd Windows-Junk-Cleaner/
Step 3: Make sure you have python installed in your pc (if not go to https://www.python.org/downloads/ )
python junk.py
Step 4: Finally this window will appear. Explore various options :)
Task(maybe):
Add a better GUI frontend