$ git clone -n https://gitee.com/doriscchao/firefox.git /var/lib/mock/dist-ocs23-build-107916-6334/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-ocs23-build-107916-6334/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/doriscchao/firefox
 * [new ref]                    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4191d00 add mozilla-1833330.patch