$ git clone -n https://gitee.com/mgb01105731/tcpdump.git /var/lib/mock/dist-an23-build-274045-64220/root/chroot_tmpdir/scmroot/tcpdump
Cloning into '/var/lib/mock/dist-an23-build-274045-64220/root/chroot_tmpdir/scmroot/tcpdump'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/tcpdump
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52d031f init upstream from version 4.99.4