Checking out tag instead of branch.

Author: emarinier

galaxy/package_neptune/tool_dependencies.xml

@@ -6,7 +6,7 @@
 
             <actions>
                 <action type="shell_command">git clone https://github.com/phac-nml/neptune.git</action>
-				<action type="shell_command">git checkout release/1.2</action>
+				<action type="shell_command">git checkout tags/v1.2.2</action>
 
 				<action type="move_directory_files">
 					<source_directory>neptune</source_directory>