请帮帮我,伙计们我做错了什么
<scm>
<connection> scm:git:https://github.com/MyName/MyProject.git</connection>
<url> scm:git:https://github.com/MyName/MyProject.git</url>
<developerConnection> scm:git:https://github.com/MyName/MyProject.git</developerConnection>
</scm>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.build.timestamp.format>yyyy-MM-dd-HH-mm</maven.build.timestamp.format>
<build.timestamp>${maven.build.timestamp}</build.timestamp>
</properties>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>buildnumber-maven-plugin</artifactId>
<version>1.3</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>create</goal>
</goals>
</execution>
</executions>
</plugin>
这个结果总是在 [INFO] Storing buildNumber: null at timestamp: 1420565104807 [WARNING] Cannot get the branch information from the git repository: Detecting the current branch failed: