You are trying to push along a patch…and it dawns on you that you have no idea who to ask. The answer is out there.

Assuming it is an OpenStack project, it configuration for it is stored in the ACLs section of the project-config repo.. For example, the Keystone project is managed by the keystone-core group.

Once you have the name of the group, you can look up on gerrit and list it to find the members. Here is Keystone.