Where can I find the source code for 1.8.9?

I tried cloning the 1.7.10 branch and changing the versions but ran into this issue:

\Schematica\build\sources\api\java\com\github\lunatrius\schematica\api\event\PostSchematicCaptureEvent.java:4: error: package cpw.mods.fml.common.eventhandler does not exist
import cpw.mods.fml.common.eventhandler.Event;

I was hoping to find the source code for 1.8.9 so I don't have to go through and modify the 1.7.10 branch.

Thanks in advance.