$ git clone -n https://src.fedoraproject.org/rpms/polkit-qt-1.git /var/lib/mock/f40-build-788928-135460/root/chroot_tmpdir/scmroot/polkit-qt-1
Cloning into '/var/lib/mock/f40-build-788928-135460/root/chroot_tmpdir/scmroot/polkit-qt-1'...
$ git fetch origin e987a02a385ed5fc448645972d19eb83d884150d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/polkit-qt-1
 * [new ref]         e987a02a385ed5fc448645972d19eb83d884150d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e987a02 0.200.0