In github, our organization has code-owners.
In the individual project I can
cat .github/CODEOWNERS
It says
# Code owners
* @ourorg/projectname
How can I find all git repositories for the same owner within this org? which is ourorg/projectname
This will let me know which projects are owned by our squad
Update
You can use the github search function for it.
Use org:<org-name> <teamname> path:CODEOWNERS
as search query
Old answer This assumes you have all the repos checked out locally.
I ran the command from here in order to look through all the CODEOWNERS files and search for my teamname.
grep --include=CODEOWNERS -rw '.' -e "teamname"