Require a downstream job to use the same commit as its parent

Question

If job “B” is downstream of “A” and both are retrieved from the same git repository, how can you guarantee that assembly B initiated by assembly A uses the same commit even if new commits were made to the repository, when was the "A" built?

The answer to this post suggests using the copy-artifact plugin, but there seems to be an easier way to just instruct task “B” to “use this exact hash for this build.”

Answer 1

You need a parameterized trigger plugin for jenkins installed using the Git plugin, which you probably already installed. It allows you to specify the Git SHA1 commit id for the next build as a predefined parameter.