Note:
On my Aurora laptop, I created a toolbx using fedora-40 and did:
⬢[blaisep@toolbox ~]$ sudo dnf install fedora-packager fedora-review
⬢[blaisep@toolbox ~]$ sudo usermod -a -G mock blaisep
⬢[blaisep@toolbox ~]$ fkinit -u blaise
⬢[blaisep@toolbox ~]$ koji moshimoshi
hallo, blaise!
You are using the hub at https://koji.fedoraproject.org/kojihub (Koji 1.34.1)
Authenticated via GSSAPI
… which seems pretty cool to me.