$ git clone -n https://src.fedoraproject.org/rpms/xfce-polkit.git /var/lib/mock/f41-build-side-1-2816865-32979/root/chroot_tmpdir/scmroot/xfce-polkit
Cloning into '/var/lib/mock/f41-build-side-1-2816865-32979/root/chroot_tmpdir/scmroot/xfce-polkit'...
$ git fetch origin fda6d669aae65e0205f8ed173643fb86fb7da232:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce-polkit
 * [new ref]         fda6d669aae65e0205f8ed173643fb86fb7da232 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fda6d66 convert GPLv2+ license to SPDX