title: Unable to tag SCM when I using maven release plugin
body: <p>when I using maven release plugin,I encountered some questions,the most one is tag scm failed,the error is :
  svn: “svn://192.168.5.222/show/test-show/trunk/show” does not in the revision 0 .</p>
  
  <pre><code>at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)
  at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
  at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
  at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
  at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
  at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
  at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
  at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
  at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
  at org.jvnet.hudson.maven3.launcher.Maven3Launcher.main(Maven3Launcher.java:79)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  at java.lang.reflect.Method.invoke(Method.java:597)
  at org.codehaus.plexus.classworlds.launcher.Launcher.launchStandard(Launcher.java:329)
  at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:239)
  at org.jvnet.hudson.maven3.agent.Maven3Main.launch(Maven3Main.java:158)
  at hudson.maven.Maven3Builder.call(Maven3Builder.java:98)
  at hudson.maven.Maven3Builder.call(Maven3Builder.java:64)
  at hudson.remoting.UserRequest.perform(UserRequest.java:118)
  at hudson.remoting.UserRequest.perform(UserRequest.java:48)
  at hudson.remoting.Request$2.run(Request.java:326)
  at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
  at java.util.concurrent.FutureTask.run(FutureTask.java:138)
  at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
  at java.lang.Thread.run(Thread.java:662)
  </code></pre>
  
  <p>Caused by: org.apache.maven.plugin.MojoFailureException: Unable to tag SCM</p>
  
  <p>then I found my log:</p>
  
  <p>[INFO] Executing: /bin/sh -c cd /data/.hudson/jobs/hxbos/workspace &amp;&amp; svn --username liulaixi --password '<strong>*</strong>' --no-auth-cache --non-interactive copy --file /tmp/maven-scm-49732292.commit --revision 0 svn://192.168.5.213/hxbos/hxecp-src/trunk/hxbos svn://192.168.5.213/hxbos/hxecp-src/tags/hxbos/hxbos-all-test-1.5.0
  [INFO] Working directory: /data/.hudson/jobs/hxbos/workspace</p>
  
  <p>why my --revision is 0？who can help me?thanks!</p>