Undoing failed mvn release

Ended up with a commit from mvn release:prepare,
but the scm tag was never pushed, trying to clean up.

pom.xml

@@ -2,7 +2,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.sonyericsson.jenkins.plugins.bfa</groupId>
     <artifactId>build-failure-analyzer</artifactId>
-    <version>2.5.3</version>
+    <version>${revision}${changelist}</version>
     <packaging>hpi</packaging>
     <name>Build Failure Analyzer</name>
     <url>https://github.com/jenkinsci/build-failure-analyzer-plugin/blob/master/docs/README.md</url>
@@ -350,7 +350,7 @@
         <connection>scm:git:https://github.com/jenkinsci/build-failure-analyzer-plugin.git</connection>
         <developerConnection>scm:git:[email protected]:jenkinsci/build-failure-analyzer-plugin.git</developerConnection>
         <url>https://github.com/jenkinsci/build-failure-analyzer-plugin</url>
-        <tag>build-failure-analyzer-2.5.3</tag>
+        <tag>${scmTag}</tag>
     </scm>
     <reporting>
         <plugins>