$ git clone -n https://gitee.com/src-anolis-os/userspace-rcu.git /var/lib/mock/dist-an23-build-331684-69547/root/chroot_tmpdir/scmroot/userspace-rcu
Cloning into '/var/lib/mock/dist-an23-build-331684-69547/root/chroot_tmpdir/scmroot/userspace-rcu'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/userspace-rcu
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac66011 add loongarch support