$ git clone -n https://src.fedoraproject.org/rpms/kde-gtk-config.git /var/lib/mock/f40-build-2516435-61729/root/chroot_tmpdir/scmroot/kde-gtk-config
Cloning into '/var/lib/mock/f40-build-2516435-61729/root/chroot_tmpdir/scmroot/kde-gtk-config'...
$ git fetch origin 178554bff8018d8bfd4ebac104a25ece1f46f37c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kde-gtk-config
 * [new ref]         178554bff8018d8bfd4ebac104a25ece1f46f37c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 178554b 6.0.1