$ git clone -n https://src.fedoraproject.org/rpms/polkit-kde.git /var/lib/mock/f40-build-2196173-51554/root/chroot_tmpdir/scmroot/polkit-kde
Cloning into '/var/lib/mock/f40-build-2196173-51554/root/chroot_tmpdir/scmroot/polkit-kde'...
$ git fetch origin b58ab5e5ab69b87600499ac3fbdd70f3c254add3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/polkit-kde
 * [new ref]         b58ab5e5ab69b87600499ac3fbdd70f3c254add3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b58ab5e 5.91.0