An example output of a bash session describing an "issue" with Go modules

session.bash

johnrinehart@modie test $ tree -L 3
.
├── folder
│   └── pkg
│       └── pkg.go
└── go.mod

2 directories, 2 files
johnrinehart@modie test $ go test ./...
folder/pkg/pkg.go:4:2: git ls-remote -q https://github.com/a/folder in /Users/johnrinehart/go/pkg/mod/cache/vcs/0924eb5d08e2c012fe
3519c5d5cdb67347a7d2f7906fb84bf80f256e9cc225fd: exit status 128:
        ERROR: Repository not found.
        fatal: Could not read from remote repository.

        Please make sure you have the correct access rights
        and the repository exists.
johnrinehart@modie test $ go mod tidy
github.com/a/folder/pkg imports
        github.com/a/folder: git ls-remote -q https://github.com/a/folder in /Users/johnrinehart/go/pkg/mod/cache/vcs/0924eb5d08e2c
012fe3519c5d5cdb67347a7d2f7906fb84bf80f256e9cc225fd: exit status 128:
        ERROR: Repository not found.
        fatal: Could not read from remote repository.

        Please make sure you have the correct access rights
        and the repository exists.
johnrinehart@modie test $ cat go.mod 
module github.com/a

go 1.13
johnrinehart@modie test $ cat folder/pkg/pkg.go 
package pkg

import (
        "github.com/a/folder"
)

func Func() {
        folder.Println()
}