$ git clone -n https://gitee.com/lzq11122/dav1d.git /var/lib/mock/dist-an23-build-448208-73363/root/chroot_tmpdir/scmroot/dav1d
Cloning into '/var/lib/mock/dist-an23-build-448208-73363/root/chroot_tmpdir/scmroot/dav1d'...
$ git fetch origin 4a30300c51a4989e3530872425a878677b01e102:KOJI_FETCH_HEAD
From https://gitee.com/lzq11122/dav1d
 * [new ref]         4a30300c51a4989e3530872425a878677b01e102 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a30300 test