$ git clone -n https://src.fedoraproject.org/rpms/sweeper.git /var/lib/mock/f40-build-2042777-48573/root/chroot_tmpdir/scmroot/sweeper
Cloning into '/var/lib/mock/f40-build-2042777-48573/root/chroot_tmpdir/scmroot/sweeper'...
$ git fetch origin 0c903252631d5bda6970025d192ef87496f15e0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sweeper
 * [new ref]         0c903252631d5bda6970025d192ef87496f15e0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c90325 Update deps