$ git clone -n https://gitee.com/alpha-wang/erlang.git /var/lib/mock/dist-an8-epao-build-419923-72889/root/chroot_tmpdir/scmroot/erlang
Cloning into '/var/lib/mock/dist-an8-epao-build-419923-72889/root/chroot_tmpdir/scmroot/erlang'...
$ git fetch origin a8:KOJI_FETCH_HEAD
From https://gitee.com/alpha-wang/erlang
 * [new branch]      a8         -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 960c393 update to erlang-22.0.7