$ git clone -n https://gitee.com/src-opencloudos-rpms/firefox.git /var/lib/mock/dist-oc8-firefox-build-256449-84596/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-oc8-firefox-build-256449-84596/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin c9699e4111dc76f9f95b7cc0bd8ea5c4c103afbf:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/firefox
 * [new ref]         c9699e4111dc76f9f95b7cc0bd8ea5c4c103afbf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9699e4 import firefox-153.7.0-1.tl3.ap.1