$ git clone -n https://src.fedoraproject.org/rpms/kf6-kguiaddons.git /var/lib/mock/f42-build-side-114581-60922841-6585939/root/chroot_tmpdir/scmroot/kf6-kguiaddons
Cloning into '/var/lib/mock/f42-build-side-114581-60922841-6585939/root/chroot_tmpdir/scmroot/kf6-kguiaddons'...
$ git fetch origin 2baebc66d2c0459e1431cca0d6c8ba7be8f0a202:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kguiaddons
 * [new ref]         2baebc66d2c0459e1431cca0d6c8ba7be8f0a202 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2baebc6 6.16.0