$ git clone -n https://src.fedoraproject.org/rpms/gnome-kra-ora-thumbnailer.git /var/lib/mock/f40-build-1999075-44299/root/chroot_tmpdir/scmroot/gnome-kra-ora-thumbnailer
Cloning into '/var/lib/mock/f40-build-1999075-44299/root/chroot_tmpdir/scmroot/gnome-kra-ora-thumbnailer'...
$ git fetch origin 6c534f1203f6cbdd7ee0e794373652dd65e0af7e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-kra-ora-thumbnailer
 * [new ref]         6c534f1203f6cbdd7ee0e794373652dd65e0af7e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c534f1 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild