$ git clone -n https://gitee.com/wenyuzifang/libisoburn.git /var/lib/mock/dist-an23-build-469345-74027/root/chroot_tmpdir/scmroot/libisoburn
Cloning into '/var/lib/mock/dist-an23-build-469345-74027/root/chroot_tmpdir/scmroot/libisoburn'...
$ git fetch origin a61d46583be9cb15a6303afdb7cca1f22499607c:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/libisoburn
 * [new ref]         a61d46583be9cb15a6303afdb7cca1f22499607c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a61d465 Update code from upstream