Fix downloading of raw files with folder names

Fix downloading of raw files with folder names

Previously an error occured for an URL like
"http://phorkie.cwboo/18/rev-raw/1f656befc962f35c6adbce29f3fe30d8297489e8/foo/bar.ini":

> Some errors in executing git command
> Output: Error: fatal: ambiguous argument '1f656befc962f35c6adbce29f3fe30d8297489e8/foo':
> unknown revision or path not in the working tree.
> Use '--' to separate paths from revisions, like this: 'git <command> [<revision>...] -- [<file>...]'