If you run a build for revision XXX, buildbot will display this as "master" on the console, even if that revision isn't on that branch. This is extremely confusing.
To reproduce, start a job, for example: https://autobuilder.yoctoproject.org/valkyrie/#/builders/22/force/genericarm64-alt Then remove the "Branch:" filed for Poky and set the "Revision:" field. Example build that produced the issue: https://autobuilder.yoctoproject.org/valkyrie/#/builders/22/builds/1998