$ git clone -n https://src.fedoraproject.org/rpms/kf6-kxmlgui.git /var/lib/mock/f42-build-862200-170680/root/chroot_tmpdir/scmroot/kf6-kxmlgui
Cloning into '/var/lib/mock/f42-build-862200-170680/root/chroot_tmpdir/scmroot/kf6-kxmlgui'...
$ git fetch origin 9e211c390bf3fa05d31c3ea2bdb2a2afcfcf31ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kxmlgui
 * [new ref]         9e211c390bf3fa05d31c3ea2bdb2a2afcfcf31ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e211c3 6.8.0