$ git clone -n https://src.fedoraproject.org/rpms/xfce-polkit.git /var/lib/mock/f45-build-38768-728/root/chroot_tmpdir/scmroot/xfce-polkit
Cloning into '/var/lib/mock/f45-build-38768-728/root/chroot_tmpdir/scmroot/xfce-polkit'...
$ git fetch origin 40d54b9622872f2083066845761e5e1e3cbd36c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce-polkit
 * [new ref]         40d54b9622872f2083066845761e5e1e3cbd36c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 40d54b9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild