$ git clone -n https://gitee.com/src-opencloudos-rpms/thunderbird.git /var/lib/mock/dist-oc8-firefox-build-81390-55015/root/chroot_tmpdir/scmroot/thunderbird
Cloning into '/var/lib/mock/dist-oc8-firefox-build-81390-55015/root/chroot_tmpdir/scmroot/thunderbird'...
$ git fetch origin 1473f40acf9bba4870c950c0c7780f4a6643a9d3:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/thunderbird
 * [new ref]         1473f40acf9bba4870c950c0c7780f4a6643a9d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1473f40 Add auto-patch changlog