$ git clone -n https://gitee.com/zhangwenlong01/systemd.git /var/lib/mock/dist-an23-build-316486-67761/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-an23-build-316486-67761/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin 5f4e3846424fca5c8c70662683fa0c154ee0ccd3:KOJI_FETCH_HEAD
From https://gitee.com/zhangwenlong01/systemd
 * [new ref]         5f4e3846424fca5c8c70662683fa0c154ee0ccd3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f4e384 add loongarch64 support for systemd