$ git clone -n https://gitee.com/src-anolis-os/ffmpeg.git /var/lib/mock/dist-an23.5-AImanager-build-529481-79946/root/chroot_tmpdir/scmroot/ffmpeg
Cloning into '/var/lib/mock/dist-an23.5-AImanager-build-529481-79946/root/chroot_tmpdir/scmroot/ffmpeg'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/ffmpeg
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 98d0bde fix spec version