$ git clone -n https://gitee.com/idolsama/systemd.git /var/lib/mock/dist-an23-build-326532-68995/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-an23-build-326532-68995/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin 6cda26456622a2f84887d032585888982719924d:KOJI_FETCH_HEAD
From https://gitee.com/idolsama/systemd
 * [new ref]         6cda26456622a2f84887d032585888982719924d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6cda264 add riscv64 support