ITOOLS-9470: Fix for the double-build problem
ITOOLS-9470: Fix for the double-build problem

Turns out the git plugin will trigger builds regardless of whether you
have 'Poll SCM' checked or not, and one for each changed ref.  We
prevent this by having the branch name listed as a specific hash (which
is a passed in parameter).

terabyte/stashbot,alihalabyah/stashbot,terabyte/stashbot,dreilly1982/stashbot,alihalabyah/stashbot,dreilly1982/stashbot,palantir/stashbot,palantir/stashbot,palantir/stashbot,dreilly1982/stashbot,alihalabyah/stashbot,terabyte/stashbot,dreilly1982/stashbot,palantir/stashbot,terabyte/stashbot,alihalabyah/stashbot