$ git clone -n https://gitee.com/src-opencloudos-rpms/firefox.git /var/lib/mock/dist-oc8-firefox-build-249827-83911/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-oc8-firefox-build-249827-83911/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin 279d11b124153f2846ec0ec69258e59e605ccbee:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/firefox
 * [new ref]         279d11b124153f2846ec0ec69258e59e605ccbee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 279d11b import firefox-140.15.0-1.tl3.ap.1