Every now and again we receive an update from the application lsb-release. It will overwrite the code that is written on your system in the file /etc/lsb-release with its own.
Neofetch uses this file to determine on what system it has been installed and will show the appropriate ascii logo. In this case we get an Arch logo.
Change the code back to the original code with a copy/paste.
In the video we show you where you can find the code on the github.
Copy/paste this code in /etc/lsb-release.
Check manually if the release and codename are updated in the future. Written June 2018.