$ git clone -n https://gitee.com/mgb01105731/syslinux.git /var/lib/mock/dist-an23.3-build-428478-73027/root/chroot_tmpdir/scmroot/syslinux
Cloning into '/var/lib/mock/dist-an23.3-build-428478-73027/root/chroot_tmpdir/scmroot/syslinux'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/syslinux
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd2b5ef add sha1pass-option.list