# What I did was
# sudo -i reprepro -C component/kubernetes-future copy buster-wikimedia stretch-wikimedia kubernetes

# What I got is:
jayme@apt1001:~$ grep Version /srv/wikimedia/dists/buster-wikimedia/component/kubernetes-future/*/Packages
/srv/wikimedia/dists/buster-wikimedia/component/kubernetes-future/binary-amd64/Packages:Version: 1.16.15-1
/srv/wikimedia/dists/buster-wikimedia/component/kubernetes-future/binary-amd64/Packages:Version: 1.16.15-1
/srv/wikimedia/dists/buster-wikimedia/component/kubernetes-future/binary-amd64/Packages:Version: 1.16.15-1
jayme@apt1001:~$ sudo -i reprepro list buster-wikimedia kubernetes
buster-wikimedia|main|source: kubernetes 1.13.12-1
buster-wikimedia|component/kubernetes-future|source: kubernetes 1.16.15-2

jayme@apt1001:~$ grep Version /srv/wikimedia/dists/stretch-wikimedia/component/kubernetes-future/*/Packages
/srv/wikimedia/dists/stretch-wikimedia/component/kubernetes-future/binary-amd64/Packages:Version: 1.16.15-2
/srv/wikimedia/dists/stretch-wikimedia/component/kubernetes-future/binary-amd64/Packages:Version: 1.16.15-2
/srv/wikimedia/dists/stretch-wikimedia/component/kubernetes-future/binary-amd64/Packages:Version: 1.16.15-2
jayme@apt1001:~$ sudo -i reprepro list stretch-wikimedia kubernetes
stretch-wikimedia|main|source: kubernetes 1.13.12-1
stretch-wikimedia|component/kubernetes-future|source: kubernetes 1.16.15-2