Hi, I recently was preparing an rclone pull request and ran into an issue with the instructions in CONTRIBUTING.md for checking out the source code.
go get -u github.com/rclone/rclone
cd $GOPATH/src/github.com/rclone/rclone
The go get command apparently downloaded a bunch of modules in $GOPATH but there was no src directory containing the repository. I ended up manually cloning the repository to the expected path and proceeding from there.