$ git clone -n https://gitee.com/wenyuzifang/libblockdev.git /var/lib/mock/dist-an23-build-462602-73799/root/chroot_tmpdir/scmroot/libblockdev
Cloning into '/var/lib/mock/dist-an23-build-462602-73799/root/chroot_tmpdir/scmroot/libblockdev'...
$ git fetch origin 90a2a27796f9ca7f8b6fd96cc70c29cc1e60d2dd:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/libblockdev
 * [new ref]         90a2a27796f9ca7f8b6fd96cc70c29cc1e60d2dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90a2a27 Update code from upstream