Bug: Git-Alias is callable from outside a git repo

[Niklas <git@xxxxxxxxxxxxx>]

Steps to reproduce:

1. Having the following global .gitconfig

[alias]
    f = "!echo "test""

2. Calling `git f` in a folder which does not belong to a git repo

Expected Behavior: 

Seeing some message like like
`fatal: not a git repository (or any parent up to mount point /)`

Actual Behavior:

Prints "test"

Git 2.37.1 under Arch Linux