Unable to connect to go.googlesource.com - connection refused, and network is unreachable

[leguminosa]

What version of dep are you using (dep version)?

dep:
 version     : v0.5.4
 build date  : 2019-07-01
 git hash    : 1f7c19e
 go version  : go1.12.6
 go compiler : gc
 platform    : linux/amd64
 features    : ImportDuringSolve=false

What dep command did you run?

dep ensure -v -vendor-only

What did you expect to see?

dep ensure success as usual

What did you see instead?

(skipped some parts because of private repos)

...
(126/161) Wrote github.com/ugorji/go@v1.1
(127/161) Failed to write golang.org/x/oauth2@master
...
grouped write of manifest, lock and vendor: error while writing out vendor tree: failed to write dep tree: failed to export golang.org/x/oauth2: 
    (1) failed to list versions for https://go.googlesource.com/oauth2: fatal: unable to connect to go.googlesource.com:
go.googlesource.com[0: 172.217.194.82]: errno=Connection refused
go.googlesource.com[1: 2404:6800:4003:c04::52]: errno=Network is unreachable

: exit status 128

[mvdan]

Dep was officially deprecated earlier this year, and the proposal to archive this repository was accepted. As such, I'm closing outstanding issues before archiving the repository. For any further comments, please use the proposal thread on the Go issue tracker. Thanks!