-> mkdir temp && cd temp

-> go mod init 'temp'

-> cat go.mod
module github.com/Helcaraxan/testing

go 1.13

-> go get github.com/google/go-github/v9  ## NB: That repo only got a go.mod in v18.0.0.
go: downloading github.com/google/go-github v17.0.0+incompatible
go: extracting github.com/google/go-github v17.0.0+incompatible
go: finding github.com/google/go-github/v9 v9.0.0
go get github.com/google/go-github/v9: module github.com/google/go-github@upgrade (v17.0.0+incompatible) found, but does not contain package github.com/google/go-github/v9

-> go get github.com/google/go-github

-> cat go.mod
module github.com/Helcaraxan/testing

go 1.13

require github.com/google/go-github v17.0.0+incompatible // indirect