Comment # 2 on bug 1222338 from Georg Pfuetzenreuter

I just tried this out of curiosity, and it seems to work:

```
$ podman run --rm --pull=always -it opensuse/tumbleweed
7fe8f2c44dad:/ # tee /etc/zypp/repos.d/chrome.repo <<EOF
> [google-chrome]
> enabled=1
> autorefresh=1
> baseurl=https://dl.google.com/linux/chrome/rpm/stable/x86_64
> gpgcheck=1
> EOF
...
7fe8f2c44dad:/ # zypper ref
Looking for gpg key ID 9B30ACF2 in cache /var/cache/zypp/pubkeys.
Repository google-chrome does not define additional 'gpgkey=' URLs.
Warning: File 'repomd.xml' from repository 'google-chrome' is signed with an
unknown key 'E88979FB9B30ACF2'.

    Note: Signing data enables the recipient to verify that no modifications
occurred after the data
    were signed. Accepting data with no, wrong or unknown signature can lead to
a corrupted system
    and in extreme cases even to a system compromise.

    Note: File 'repomd.xml' is the repositories master index file. It ensures
the integrity of the
    whole repo.

    Warning: We can't verify that no one meddled with this file, so it might
not be trustworthy
    anymore! You should not continue unless you know it's safe.

File 'repomd.xml' from repository 'google-chrome' is signed with an unknown key
'E88979FB9B30ACF2'. Continue? [yes/no] (no): yes
Retrieving repository 'google-chrome' metadata ....................[done]
Building repository 'google-chrome' cache .........................[done]
Retrieving repository 'openSUSE-Tumbleweed-Non-Oss' metadata ......[done]
Building repository 'openSUSE-Tumbleweed-Non-Oss' cache ...........[done]
Retrieving repository 'Open H.264 Codec (openSUSE Tumbleweed)' metadata [done]
Building repository 'Open H.264 Codec (openSUSE Tumbleweed)' cache [done]
Retrieving repository 'openSUSE-Tumbleweed-Oss' metadata ..........[done]
Building repository 'openSUSE-Tumbleweed-Oss' cache ...............[done]
Retrieving repository 'openSUSE-Tumbleweed-Update' metadata .......[done]
Building repository 'openSUSE-Tumbleweed-Update' cache ............[done]
All repositories have been refreshed.

7fe8f2c44dad:/ # rpm -q curl
curl-8.7.1-1.1.x86_64
7fe8f2c44dad:/ # rpm -q libzypp
libzypp-17.32.2-1.1.x86_64
```

No occurrences of the mentioned error in zypper.log either.