How to freeup space after using InstallAssistant.pkg to create 'install macos bigsur.app'

Hi everybody, I downloaded macos Big Sur using gibmacos. But after opening 'InstallAssistant.pkg', instead of installing on main partition, I chose another one, because I'm running out of space on main partition. Installation failed bacause of low space. But now i ended up with some garbage cache that I don't even know where it is.

Now how can i remove these caches?