[krater23]

Downloading this attachement doesn't executes it. Checking out a branch in this case executes the file in the branch. Thats a big difference.

[dev_daftly]

In this case, if you just run a git command yourself it executes the file as well.

[brookst]

On windows I guess?

On Linux and MacOS you'd need to run ./git to execute a malicious binary in the cloned repo.