If a build fails with a race then it can be non-trivial to start it again if there are many branches or even specific SHAs involved. It would be great if there was a "let's try that again" button which would fire off a build with the same SHAs (not names, but SHAs), adding (respin) to the reason.
Resolved by the new infrastructure architecture of helper scripts (yocto-autobuilder-helper) with a more recent buildbot with minimal configuration (yocto-autobuilder2). Buildbot nine UI has a build again (or similar?) button.