$ git clone -n https://gitee.com/lzq11122/libvpx.git /var/lib/mock/dist-an23-build-445266-73273/root/chroot_tmpdir/scmroot/libvpx
Cloning into '/var/lib/mock/dist-an23-build-445266-73273/root/chroot_tmpdir/scmroot/libvpx'...
$ git fetch origin 8a9b6f4254a4da78f3d65ed68aaddf25e99fda21:KOJI_FETCH_HEAD
From https://gitee.com/lzq11122/libvpx
 * [new ref]         8a9b6f4254a4da78f3d65ed68aaddf25e99fda21 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a9b6f4 libvpx-modified