[maven-release-plugin] prepare release git-client-6.4.0

Author: MarkEWaite

pom.xml

@@ -10,7 +10,7 @@
   </parent>
 
   <artifactId>git-client</artifactId>
-  <version>${revision}${changelist}</version>
+  <version>6.4.0</version>
   <packaging>hpi</packaging>
 
   <name>Jenkins Git client plugin</name>
@@ -27,7 +27,7 @@
   <scm>
     <connection>scm:git:https://github.com/${gitHubRepo}</connection>
     <developerConnection>scm:git:[email protected]:${gitHubRepo}.git</developerConnection>
-    <tag>${scmTag}</tag>
+    <tag>git-client-6.4.0</tag>
     <url>https://github.com/${gitHubRepo}</url>
   </scm>