$ git clone -n https://gitee.com/mgb01105731/vsftpd.git /var/lib/mock/dist-an23-build-273999-64217/root/chroot_tmpdir/scmroot/vsftpd
Cloning into '/var/lib/mock/dist-an23-build-273999-64217/root/chroot_tmpdir/scmroot/vsftpd'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/vsftpd
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17fb913 init upstream from version 3.0.5