Multi-repository Support: Git "Rebase HEAD To Fetched" option

I have many repo groups, some with only a few repos and some with over 20.  I use the "fetch in background" feature to do so when online, in case I am soon working offline, and also as a local preview of incoming changes.

With many repos having fetched changes, similar to Pull/Push on selected repos and repo groups, I want a single menu option to rebase each repo to the fetched changes.  This would save a lot of manual processing work and waiting time on many updated repos, especially repo groups with larger repo quantities.