CCOGS.zip is a release file of the Minecraft resource pack Chris' Collection of German Stuff, made for Minecraft 1.12.2. It was published on June 1, 2019 and is 65.7 MB in size. For the full description, screenshots and every other version, visit the Chris' Collection of German Stuff resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.