Git::Repository is a Perl interface to Git, allowing scripted interactions with one or more repositories. It's a low-level interface, allowing to call any Git command, either porcelain or plumbing, including bidirectional commands such as git commit-tree.

Since it is a low-level interface, it doesn't provide any fancy way to call Git commands. It is up to the programmer to setup any environment variables that the underlying Git command may need and use.