$ git clone -n https://gitee.com/opencloudos-stream/firefox.git /var/lib/mock/dist-ocs23-base-build-298014-29146/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-ocs23-base-build-298014-29146/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/firefox
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d913b49 !23 [IAZUMP]:Rebuild for nss in opencloudos-stream Merge pull request !23 from ocs-bot/master