$ git clone -n https://src.fedoraproject.org/rpms/polkit-kde.git /var/lib/mock/f42-build-3342315-44991/root/chroot_tmpdir/scmroot/polkit-kde
Cloning into '/var/lib/mock/f42-build-3342315-44991/root/chroot_tmpdir/scmroot/polkit-kde'...
$ git fetch origin 59af86329e16e63f4a8e9bdc200fc918834c56b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/polkit-kde
 * [new ref]         59af86329e16e63f4a8e9bdc200fc918834c56b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 59af863 6.3.2