Clean downloaded sources from AUR clones after aurs

After a successful sync, aurb runs git clean -fx in each clone under the aurutils sync folder, removing downloaded sources and build logs while keeping tracked files and VCS source folders.

.local/bin/aurb

@@ -31,3 +31,13 @@ aur "$cmd" \
     --bind-rw "$THINLTO_HOST_DIR" \
     --bind "$HOME/.config/aurb" \
     "${args[@]}"
+status=$?
+
+# After a successful sync, drop downloaded sources and logs from the AUR clones. Without -d,
+# git clean keeps untracked directories, so VCS sources (bare clones) survive.
+if [[ $cmd == sync && $status -eq 0 ]]; then
+    for clone in "${AURDEST:-${XDG_CACHE_HOME:-$HOME/.cache}/aurutils/sync}"/*/; do
+        [[ -d $clone.git ]] && git -C "$clone" clean -fxq
+    done
+fi
+exit "$status"