go dep download

git clone https://github.com/golang/dep.git
cd dep
chmod a+x  install.sh
./install.sh

result:

./install.sh
ARCH = arm
OS = linux
Will install into /home/pi/go/bin
Fetching https://github.com/golang/dep/releases/latest..
Release Tag = v0.5.4
Fetching https://github.com/golang/dep/releases/tag/v0.5.4..
Fetching https://github.com/golang/dep/releases/download/v0.5.4/dep-linux-arm..
Setting executable permissions.
Moving executable to /home/pi/go/bin/dep