You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: main.go
    path of file: ./repos/go-git/_examples/open
    
    the code of the file until where you have to start completion: package main

import (
	"fmt"
	"os"

	"github.com/go-git
    
func main() {
	CheckArgs("<path>")
	path := os.Args[1]

	// We instantiate a new repository targeting the given path (the .git folder)
	r, err := git.PlainOpen(path)
	CheckIfError(err)

	// Length of the HEAD history
	Info("git rev-list HEAD --count")

	// ... retrieving the HEAD reference
	ref, err := r.Head()
	CheckIfError(err)

	// ... retrieves the commit history
	cIter, err := r.Log(&git.LogOptions{From: ref.Hash()})
	CheckIfError(err)

	// ... just iterates over the commits
	var cCount int
	err = cIter.ForEach(func(c *object.Commit) error {
		cCount++

		return nil
	})
	CheckIfError(err)

	fmt.Println(cCount)
}