Where did I download that file from?

Assuming you used Chrome and a modern Linux file system…

$ attr -g xdg.origin.url Downloads/google-chrome-stable_current_x86_64.rpm 
Attribute "xdg.origin.url" had a 74 byte value for /home/dan/Downloads/google-chrome-stable_current_x86_64.rpm:
https://dl.google.com/linux/direct/google-chrome-stable_current_x86_64.rpm