kiss: do a less shallow clone to enable 'git describe'

This downloads all reachable commits and then blobs and trees on demand. It
swaps the clone from shallow to treeless. In other words, it's a less
shallow shallow clone which makes 'git describe' work.

kiss

@@ -273,7 +273,7 @@ pkg_extract() {
                 log "$1" "Cloning ${url%[#@]*}"; {
                     git init
                     git remote add origin "${url%[#@]*}"
-                    git fetch -t --depth 1 origin "$com" || git fetch -t
+                    git fetch -t --filter=tree:0 origin "$com" || git fetch -t
                     git -c advice.detachedHead=0 checkout "${com:-FETCH_HEAD}"
                 } || die "$1" "Failed to clone $src"
             ;;