5f277b5023
Turned out that some update jobs failed due to
```
{
"message": "Bad credentials",
"documentation_url": "https://developer.github.com/v3"
}
```
This is probably due to credentials expiring (long workflow startup?),
or some internal github issue.
For now, removing authenticated `curl` calls because most
of them can be done anonymously, and keeping them only when needed.