[maven-release-plugin] prepare for next development iteration

pom.xml

@@ -33,7 +33,7 @@ THE SOFTWARE.
 
   <groupId>org.jenkins-ci.main</groupId>
   <artifactId>jenkins-test-harness</artifactId>
-  <version>2.47</version>
+  <version>2.48-SNAPSHOT</version>
 
   <name>Test harness for Jenkins and plugins</name>
   <description>Harness used to run functional tests of Jenkins core and plugins.</description>
@@ -42,7 +42,7 @@ THE SOFTWARE.
     <connection>scm:git:git://github.com/jenkinsci/${project.artifactId}.git</connection>
     <developerConnection>scm:git:ssh://git@github.com/jenkinsci/${project.artifactId}.git</developerConnection>
     <url>https://github.com/jenkinsci/${project.artifactId}</url>
-    <tag>jenkins-test-harness-2.47</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <properties>