Source info missing from release file on non-jenkins builds

[sxa]

What are you trying to do? Rebuild temurin identically

Expected behaviour: JDK17 build is identical as far as practical

Observed behaviour: release file is missing build source info. Log contains:

===GENERATING RELEASE FILE===
ADDING IMPLEMENTOR
ADDING BUILD SHA
Unable to fetch build SHA, does a work tree exist?...
ADDING BUILD SOURCE REPO
Unable to fetch Build Source Repo, does a work tree exist?...
ADDING OPENJDK SOURCE REPO
Unable to fetch OpenJDK Source Repo, does a work tree exist?...

Any other comments: Likely due to the use of the workspace reference introduced in https://github.com/adoptium/temurin-build/pull/2636 at https://github.com/adoptium/temurin- build/commit/4171fe25562441c9123a0984605a5d7b57f7abd5