If you get the following error when trying to execute git pull: "Arguments to command
look dangerous", then you might want to check whether the remote repository
ends with a slash (/). This tripped me and a friend over the other day. Since
gitosis is not very verbose with its error-messages, I had to dig deep to
find this out.
In general, the path to the git repository needs to start with an alphanumeric character followed by zero or more alphanumeric characters, @, _ or -. Subdirectories have the same restrictions. So, paths cannot end in a slash.
Just edit the corresponding remote section (usually this is origin and the
section looks like [remote "origin"]) in the file .git/config and correct
the path after the colon (:), for example by removing the slash at the end.