Comment # 2 on bug 998207 from Dominique Leuenberger

That seems indeed to be the case:

> /usr/bin/gpg2 --import --homedir /tmp/XXXXX --no-default-keyring --quiet --no-tty --no-greeting --no-permission-warning --status-fd 1 /var/cache/zypp/raw/GNOME\:Next/repodata/repomd.xml.key 
[GNUPG:] KEY_CONSIDERED D3CAF5135D0A8F97AB539ED365A86F31629FF0C2 0
[GNUPG:] IMPORTED 65A86F31629FF0C2 GNOME OBS Project <GNOME@build.opensuse.org>
[GNUPG:] IMPORT_OK 1 D3CAF5135D0A8F97AB539ED365A86F31629FF0C2
[GNUPG:] IMPORT_RES 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0
> /usr/bin/gpg2 --list-public-keys --homedir /tmp/XXXXX --no-default-keyring --quiet --with-colons --fixed-list-mode --with-fingerprint --with-sig-list --no-tty --no-greeting --batch --status-fd 1 
gpg: WARNING: unsafe permissions on homedir '/tmp/XXXXX'
tru::1:1473668728:0:3:1:5
pub:-:1024:17:65A86F31629FF0C2:1201034760:1538041187::-:::scSC:::::::
fpr:::::::::D3CAF5135D0A8F97AB539ED365A86F31629FF0C2:
uid:-::::1468921187::FD55A51127FF73B973E78F02E74A6F7591BF972F::GNOME OBS
Project <GNOME@build.opensuse.org>:::::::::
sig:::17:65A86F31629FF0C2:1468921187::::[GNUPG:] KEY_CONSIDERED
D3CAF5135D0A8F97AB539ED365A86F31629FF0C2 0
GNOME OBS Project <GNOME@build.opensuse.org>:13x:::::2:
sig:::17:3B3011B76B9D6523:1201034760::::[User ID not found]:13x:::::2: