$ git clone -n https://gitee.com/opencloudos-stream/thunderbird.git /var/lib/mock/dist-oc9-epol-build-239122-82584/root/chroot_tmpdir/scmroot/thunderbird
Cloning into '/var/lib/mock/dist-oc9-epol-build-239122-82584/root/chroot_tmpdir/scmroot/thunderbird'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/thunderbird
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df3cc5c !30 Update to 140.10.0. Merge pull request !30 from jiaxinyyang/master