$ mkdir ./-
$ echo 'echo pokpok' > ./-/pok.sh
$ chmod +x ./-/pok.sh
$ -/pok.sh 
sh: -/: invalid option
Usage:  sh [GNU long option] [option] ...
    sh [GNU long option] [option] script-file ...
GNU long options:
    --debug
    --debugger
    --dump-po-strings
    --dump-strings
    --help
    --init-file
    --login
    --noediting
    --noprofile
    --norc
    --posix
    --rcfile
    --restricted
    --verbose
    --version
Shell options:
    -ilrsD or -c command or -O shopt_option     (invocation only)
    -abefhkmnptuvxBCHP or -o option