Downloading http://pkg.jenkins-ci.org/debian-stable/binary/InRelease...
Following redirect to https://pkg.jenkins.io/debian-stable/binary/InRelease...
Error downloading http://pkg.jenkins-ci.org/debian-stable/binary/InRelease: HTTP code 404 while fetching http://pkg.jenkins-ci.org/debian-stable/binary/InRelease retrying...
Retrying 0 http://pkg.jenkins-ci.org/debian-stable/binary/InRelease...
Giving up on http://pkg.jenkins-ci.org/debian-stable/binary/InRelease...
Downloading http://pkg.jenkins-ci.org/debian-stable/binary/Release...
Following redirect to https://pkg.jenkins.io/debian-stable/binary/Release...
Success downloading http://pkg.jenkins-ci.org/debian-stable/binary/Release
Downloading http://pkg.jenkins-ci.org/debian-stable/binary/Release.gpg...
Following redirect to https://pkg.jenkins.io/debian-stable/binary/Release.gpg...
Success downloading http://pkg.jenkins-ci.org/debian-stable/binary/Release.gpg
gpgv:  RSA key ID 45F2C3D5
gpgv: Good signature from "Jenkins Project <jenkinsci-board@googlegroups.com>"

Mirror [mirror21]: http://pkg.jenkins-ci.org/debian-stable/ ./binary/ successfully added.
You can run 'aptly mirror update mirror21' to download repository contents.