For those finding this post and are using ronivay's XenOrchestraInstallerUpdater, the solution is as follows...
Edit xo-install.cfg with your favourite editor.
Look for the line...
BRANCH="master"
Comment it out and and on a new line add...
#BRANCH="master"
BRANCH="0ccfd4b"
If you then run the script and choose 2) Update, it should work.
Because I was in a hurry, I deleted the /opt/ox directory, put the SSL certs that were in it back, and then ran 1) Install so that I knew that I was certain that there were no conflicts with compiling and older version.
But either method should work.