Trying to make it possible to run this in PCT

.mvn/extensions.xml

@@ -2,6 +2,6 @@
   <extension>
     <groupId>io.jenkins.tools.incrementals</groupId>
     <artifactId>git-changelist-maven-extension</artifactId>
-    <version>1.1</version>
+    <version>1.2</version>
   </extension>
 </extensions>

pom.xml

@@ -26,16 +26,17 @@
   <properties>
     <revision>1.25</revision>
     <changelist>-SNAPSHOT</changelist>
+    <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
     <apacheds.version>2.0.0.AM25</apacheds.version>
     <jenkins.version>2.235.3</jenkins.version>
     <java.level>8</java.level>
     <configuration-as-code.version>1.36</configuration-as-code.version>
   </properties>
 
   <scm>
-    <connection>scm:git:git://github.com/jenkinsci/${project.artifactId}-plugin.git</connection>
-    <developerConnection>scm:git:[email protected]:jenkinsci/${project.artifactId}-plugin.git</developerConnection>
-    <url>https://github.com/jenkinsci/${project.artifactId}-plugin</url>
+    <connection>scm:git:git://github.com/${gitHubRepo}.git</connection>
+    <developerConnection>scm:git:[email protected]:${gitHubRepo}.git</developerConnection>
+    <url>https://github.com/${gitHubRepo}</url>
     <tag>${scmTag}</tag>
   </scm>
 
@@ -53,6 +54,11 @@
   </pluginRepositories>
 
   <dependencies>
+    <dependency> <!-- to appear earlier in the test CP for purposes of PCT -->
+      <groupId>org.jenkins-ci.main</groupId>
+      <artifactId>jenkins-core</artifactId>
+      <version>${jenkins.version}</version>
+    </dependency>
     <dependency> <!-- for compatibility with https://github.com/jenkinsci/jenkins/pull/4848 -->
       <groupId>org.acegisecurity</groupId>
       <artifactId>acegi-security</artifactId>