$ git clone -n https://gitee.com/wenyuzifang/libdrm.git /var/lib/mock/dist-an23-build-480673-74252/root/chroot_tmpdir/scmroot/libdrm
Cloning into '/var/lib/mock/dist-an23-build-480673-74252/root/chroot_tmpdir/scmroot/libdrm'...
$ git fetch origin b497159e41d2a0b7de3e5e20fd0ee761311abbb1:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/libdrm
 * [new ref]         b497159e41d2a0b7de3e5e20fd0ee761311abbb1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b497159 Update code from upstream