Thanks for the question @jwright!
The things described at Global variable incremented in every build still apply. There’s no built in support for this use case as our recommendation is to use a unique build number for every build, regardless of the branch / workflow, as described at https://stackoverflow.com/questions/33821137/build-versioning-in-continuous-delivery/33821876#33821876
If you have any questions just let us know! 