$ git clone -n https://github.com/xcp-ng-rpms/plug-late-sr.git /var/lib/mock/v8.3-incoming-7223-18700/root/chroot_tmpdir/scmroot/plug-late-sr
Cloning into '/var/lib/mock/v8.3-incoming-7223-18700/root/chroot_tmpdir/scmroot/plug-late-sr'...
$ git reset --hard d12ff42fa632b0bff7990c1d8a52ce7e7ff3fcfd
HEAD is now at d12ff42 Support python3