$ git clone -n https://gitee.com/lzq11122/dav1d.git /var/lib/mock/dist-an23-build-448234-73363/root/chroot_tmpdir/scmroot/dav1d
Cloning into '/var/lib/mock/dist-an23-build-448234-73363/root/chroot_tmpdir/scmroot/dav1d'...
$ git fetch origin a4e3d88c7f01e64533aa27ab17fda1785f6a30f1:KOJI_FETCH_HEAD
From https://gitee.com/lzq11122/dav1d
 * [new ref]         a4e3d88c7f01e64533aa27ab17fda1785f6a30f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a4e3d88 test