See https://git-scm.com/docs/git-clone#Documentation/git-clone.txt---recurse-submodulesltpathspec

Fixes #1356

Closes #4346

fix(git): aonly allow fast-forward merge

This reverts commit 7324e4cd.

Instead of shallow cloning every branch (using —no-single-branch), we now clone only the default branch and lazy fetch the others as needed.

fix(gitfs): fix wrong fetch arguments