https://stackoverflow.com/questions/79029456/how-can-we-execute-a-command-changing-the-command-name-argv0-in-go

hello.md

go build -o ~/bin/test-2 test-2.go

$ go run main.go
bar a b

main.go

package main

import (
	"log"
	"os"
	"os/exec"
)

func main() {
	if err := core(); err != nil {
		log.Fatal(err)
	}
}

func core() error {
	cmd := exec.Command("test-2", "a", "b")
	cmd.Args[0] = "bar"
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
		return err
	}
	return nil
}

test-2.go

package main

import (
	"fmt"
	"os"
	"strings"
)

func main() {
	fmt.Println(strings.Join(os.Args, " "))
}