$ git clone -n https://github.com/xcp-ng-rpms/openssh.git /var/lib/mock/v8.3-incoming-10858-29365/root/chroot_tmpdir/scmroot/openssh
Cloning into '/var/lib/mock/v8.3-incoming-10858-29365/root/chroot_tmpdir/scmroot/openssh'...
$ git fetch origin 3d3fb4774e48e2de0eb64f80a58502d97621cc67:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/openssh
 * [new ref]         3d3fb4774e48e2de0eb64f80a58502d97621cc67 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3d3fb47 Add: Enable ssh-rsa with warning