$ git clone -n https://gitee.com/zhangwenlong01/systemd.git /var/lib/mock/dist-an23-loongarch-build-315575-67390/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-an23-loongarch-build-315575-67390/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/zhangwenlong01/systemd
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f4e384 add loongarch64 support for systemd