$ git clone -n https://github.com/xcp-ng-rpms/openssh.git /var/lib/mock/v8.3-incoming-11574-29873/root/chroot_tmpdir/scmroot/openssh
Cloning into '/var/lib/mock/v8.3-incoming-11574-29873/root/chroot_tmpdir/scmroot/openssh'...
$ git fetch origin b11fe8760298b05acd04ff6bad629df6a27dc9a7:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/openssh
 * [new ref]         b11fe8760298b05acd04ff6bad629df6a27dc9a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b11fe87 Fix: Potential ECDSA Authorized_Keys ByPass Fix: Potential CA Authorized_Keys ByPass