Go mod problems caused by proto/go.mod
Problem 1:
% go get gitlab.com/gitlab-org/gitaly@v1.56.0
go: finding gitlab.com/gitlab-org/gitaly/proto v0.0.0-00010101000000-000000000000
go: gitlab.com/gitlab-org/gitaly/proto@v0.0.0-00010101000000-000000000000: unknown revision 000000000000
go: error loading module requirements
Problem 2:
% go get gitlab.com/gitlab-org/gitaly/proto@v1.56.0
go: finding gitlab.com/gitlab-org/gitaly/proto v1.56.0
go get gitlab.com/gitlab-org/gitaly/proto@v1.56.0: unknown revision proto/v1.56.0