error: .repo/manifests/: contains uncommitted changes

已經下載了Android源碼，但是現在需要想更新，便可以直接使用repo sync同步到本地。可能會出現如下錯誤：
$ repo sync
remote: Counting objects: 10, done.
remote: Compressing objects: 100% (4/4), done.
remote: Total 6 (delta 2), reused 6 (delta 2)
Unpacking objects: 100% (6/6), done.
From git://github.com/richi-chen/Pandaboard-ICS-repo
   3ea7f09..11ecd6d  master     -> origin/master
   534d620..5fa74f5  omapzoom   -> origin/omapzoom
error: .repo/manifests/: contains uncommitted changes
網友解決：richi 大蝦：
to recover any uncommitted change, you should use 'git stash' and 'git clean -f -d'
for example: if you find it say there are uncommitted changes in .repo/manifests, you shoud 'cd .repo/manifests' and then 'git stash', 'git clean -f -d'