$ git clone -n https://gitee.com/zhoujiajia111/libass.git /var/lib/mock/dist-an23-dde-build-443063-73211/root/chroot_tmpdir/scmroot/libass
Cloning into '/var/lib/mock/dist-an23-dde-build-443063-73211/root/chroot_tmpdir/scmroot/libass'...
$ git fetch origin 4a2689c261217298e923bb43db76ccb7a5381a9e:KOJI_FETCH_HEAD
From https://gitee.com/zhoujiajia111/libass
 * [new ref]         4a2689c261217298e923bb43db76ccb7a5381a9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a2689c Update version to fix CVE-2020-24994