ExitStatus will return the exit-code from an error returned by Wait().

GitPath returns the path to the `git` binary.

New creates a Command from an exec.Cmd.

WaitAllDone waits for all commands started by the command package to finish.

GitEnv contains the ENV variables for git commands.

Command encapsulates a running exec.Cmd.

SpawnConfig holds configuration for command spawning timeouts and parallelism.