From Fedora Project Wiki

Mount Plugin

This plugin allows you to mount directories into chroot. The mount plugin is enabled by default, but has no configured directories to mount.

Configuration

You can disable this plugin by:

config_opts['plugin_conf']['mount_enable'] = False

you can configure this plugin by:

config_opts['plugin_conf']['mount_enable'] = True
config_opts['plugin_conf']['mount_opts']['dirs'].append(("/dev/device", "/mount/path/in/chroot/", "vfstype", "mount_options"))

A real life example:

config_opts['plugin_conf']['mount_opts']['dirs'].append(("server.example.com:/exports/data", "/mnt/data", "nfs", "rw,hard,intr,nosuid,nodev,noatime,tcp"))