this is simples steps to do that
go to https://gitcoin.co/grants/848/arablockchain
loging to gitcoin using your github account
https://i.imgur.com/mgMr4ay.png
and connect your metamask
xclick add to cart and chose your token you want to contribut (equal to 1$)
https://i.imgur.com/k8YAlXV.png
go and accept step in your metamask
in the last reply your transaction.
when it confermed i will sent to you 0.01ETH  or more