Update SCM URL

Update the SCM URL in the SCM section of the pom file

GitHub has deprecated one of the unauthenticated access protocols (git:// protocol). The pom.xml section that defines the scm for the plugin should refer to the repository with the https:// protocol instead of the git:// protocol

Create a branch

In a local copy of your fork of the plugin repository create a git branch for your work with the command:

git checkout -b {task-identifier} master

Use https instead of git protocol

Edit the scm section in the pom XML file to replace git:// with https:// .

   <scm>
-    <connection>scm:git:git://github.com/jenkinsci/your-plugin.git</connection>
+    <connection>scm:git:https://github.com/jenkinsci/your-plugin.git</connection>
   </scm>

Create a pull request

Commit that change:

git add {modified-files}
git commit -m "{task-description}"

Push the change to GitHub:

git push origin --set-upstream {task-identifier}

Total 0 (delta 0), reused 0 (delta 0), pack-reused 0
remote:
remote: Create a pull request for '{task-identifier}' on GitHub by visiting:
remote: https://github.com/user/your-plugin/pull/new/{task-identifier}
remote:
To github.com:user/your-plugin.git
 * [new branch]      {task-identifier} -> {task-identifier}
Branch '{task-identifier}' tracking remote branch '{task-identifier}'.

Notice that the output of the command includes the URL, which can be used to open a pull request. Copy that URL in your web browser and submit a pull request.