The other branches are downloaded successfully, but the android-5.0.1_r1 is failed. The error info is:

[root@localhost /]# docker run -ti --rm -v /home/srv/aosp/mirror:/mirror -v /home/srv/aosp/android-5.0.1_r1:/aosp -v $PWD/.gitcookies:/root/.gitcookies:ro openstf/aosp:jdk7 /aosp.sh checkout-branch android-5.0.1_r1
Usage of loopback devices is strongly discouraged for production use. Either use --storage-opt dm.thinpooldev or use --storage-opt dm.no_warn_on_loop_devices=true to suppress this warning.
error: command 'sync' requires repo to be installed first.
Use "repo init" to install it here.