$ git clone -n https://gitee.com/mgb01105731/systemd_3.git /var/lib/mock/dist-an23-build-479227-74220/root/chroot_tmpdir/scmroot/systemd_3
Cloning into '/var/lib/mock/dist-an23-build-479227-74220/root/chroot_tmpdir/scmroot/systemd_3'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/systemd_3
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ece9e32 fix build err