$ git clone -n https://gitee.com/zhuhong_bo/firefox /var/lib/mock/dist-an7-els-build-411923-72790/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-an7-els-build-411923-72790/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin a7:KOJI_FETCH_HEAD
From https://gitee.com/zhuhong_bo/firefox
 * [new branch]      a7         -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
Updating files: 100% (53/53)
Updating files: 100% (53/53), done.
HEAD is now at f8b4482 change devtoolset 11