$ git clone -n https://src.fedoraproject.org/rpms/kf6-kguiaddons.git /var/lib/mock/f42-build-side-1-3576640-46801/root/chroot_tmpdir/scmroot/kf6-kguiaddons
Cloning into '/var/lib/mock/f42-build-side-1-3576640-46801/root/chroot_tmpdir/scmroot/kf6-kguiaddons'...
$ git fetch origin 62fcaa0dec7d6bd691be820abe6f61fa0a2fa458:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kguiaddons
 * [new ref]         62fcaa0dec7d6bd691be820abe6f61fa0a2fa458 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 62fcaa0 6.15 and plasma 3.4 compatibility rebuild