$ git clone -n https://gitee.com/src-opencloudos-rpms/firefox.git /var/lib/mock/dist-oc9-build-239069-82579/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-oc9-build-239069-82579/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin c976694d17e367fbb36fbd49c5492f6f10b92511:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/firefox
 * [new ref]         c976694d17e367fbb36fbd49c5492f6f10b92511 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c976694 import firefox-140.10.0-1.tl4.ap.1