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The /backport commit command can be used to quickly create a backport pull request for a given commit. Just navigate to the comment in source code hosting provider's web UI and add a comment consisting of "/backport <repo>". If the commit does not apply clean on the target repository then a message will be shown for the files with conflicts.
Workflow
Creating backports
Web UI
Navigate the to commit indented to be backported in the source code hosting provider's web UI and issue the /backport commit command. If the commit applied cleanly onto the target repository then go to the pull request linked in the reply and issue the /sponsor pull request command.
If the commit did not apply cleanly then the commit must be backport manually and backport pull request must be created manually. See the CLI section for an example of how to do this using the command-line.
CLI
Use the Skara CLI tool git-backport to try to automatically create a backport pull request for the given commit, for example git backport 5a526c1c5716f6d9a7fc94741bcdb2f424d342df. If the commit applied cleanly onto the target repository then sponsor the resulting backport pull request with git-pr sponsor, for example git pr sponsor 17.