Create a new multi-dev named updates. Then open a terminal and checkout it out.
cd site-name
git checkout updates
Add the D7 upstream as a remote so we can pull from the updates branch. Note: this remote will be available when you switch back to the master branch.
git remote add updates [email protected]:sas-isus/d7-upstream.git
Confirm the new remote repo named updates was properly added.
git remote -v
WARNING: Be careful with the next step!
Pull in changes from the D7 upstream updates branch (our remote named updates). The options to git pull are followed by .
git pull updates updates
w00t! You just fetched and merged the updates branch from the remote named updates.
Push these changes to the Pantheon multi-dev site.
git push origin updates
If your head just spun around that's OK.. it's a natural reaction.
You can now visit the multi-dev URL
https://updates-site-name.pantheonsite.io
In summary, we performed the following steps.
git checkout updates
git remote add updates [email protected]:sas-isus/d7-upstream.git
git remote -v
git pull updates updates
git push origin updates