added git step for releaser

BuildBotLib/releaser.py

@@ -22,6 +22,20 @@ class Releaser(Make):
             prodName = str(props.getProperty('prodName'))
             return baseUrl + prodName
 
+        factory.addStep(
+            steps.Git(
+                repourl=util.Interpolate('%(prop:repository)s'),
+                branch=util.Interpolate('%(prop:branch)s'),
+                mode='full',
+                method='fresh',
+                clobberOnFailure=True,
+                submodules=False,
+                retryFetch=True,
+                name='git operations',
+                description='operations of git like pull clone fetch',
+            )
+        )
+
         factory.addStep(
             self.generateStep(["wget", getUrl],
                               self.platform,