lintcheck: fix bug in downloade_and_extract() for git sources: we need to execute "git checkout xy" inside the repo dir!
lintcheck: fix bug in downloade_and_extract() for git sources: we need to execute "git checkout xy" inside the repo dir!

aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust