They should be setting the build days for a package from say the commit date of the top commit of the branch that's being built. It can't be something that does

They should be setting the build days for a package from say the commit date of the top commit of the branch that's being built. It can't be something that doesn't change when the next version is spun. If you see a behavior like that in anybody's reproducible package system or distro, you have a valid complaint.