在构建Maven项目时出现以下错误。解决这个有什么想法吗？
[ERROR] Failed to execute goal org.codehaus.mojo:buildnumber-maven-plugin:1.4:create (default) on project pwc-em: Cannot get the branch information from the scm repository :
[ERROR] Exception while executing SCM command. Error while executing command. Error while executing process. Cannot run program "git" (in directory "C:\Users\vmasama\Documents\workspace-sts-3.7.2.RELEASE\pwc-em"): CreateProcess error=2, The system cannot find the file specified
[ERROR] ->