How can you change global Git configuration parameters?

The git config command with the --global flag is used to change global Git configuration parameters. This allows you to set configurations that will apply to all repositories for the current user.

Example of changing a global parameter:

git config --global user.name "Your Name"
git config --global user.email "email@example.com"

To view all global settings, use:

git config --global --list

The file with global settings is usually located at ~/.gitconfig. It can be edited directly, but it is recommended to use the git config command for proper updates.

Thus, changing global Git parameters boils down to using the git config --global command with the necessary keys and values.