The review process page on the Fedora wiki [1] provides this link to
check if a person is already sponsored and part of the packager group:
https://admin.fedoraproject.org/accounts/group/dump/?groupname=packager
However it did not work for me today and I found this
https://admin.fedoraproject.org/accounts/group/members/packager?search=*
to work.
Thanks,
Debarshi
[1]
https://fedoraproject.org/wiki/Package_Review_Process