On some older versions of git, `git fetch` will not update all branch refs.
Created attachment 436434 [details]
This patch doesn't help. It seems like the issue is due to old 'master' branch. See https://ews-build.webkit-uat.org/#/builders/34/builds/39965/steps/3/logs/stdio
Comment on attachment 436434 [details]
I think we don't actually need this change, the UAT instance was having some issues because some machines had very weird checkouts that combined git.webkit.org with GitHub.com checkouts.