Prepare git src with git worktree

scripts/libmakepkg/source/git.sh.in

@@ -99,7 +99,7 @@ extract_git() {
 			exit 1
 		fi
 		cd_safe "$srcdir"
-	elif ! git clone --origin=origin -s "$dir" "${dir##*/}"; then
+	elif ! git -C "$dir" worktree add --force "${srcdir}/${dir##*/}"; then
 		error "$(gettext "Failure while creating working copy of %s %s repo")" "${repo}" "git"
 		plainerr "$(gettext "Aborting...")"
 		exit 1