$ git clone -n https://src.fedoraproject.org/rpms/kf5-kwindowsystem.git /var/lib/mock/f31-build-65368-29700/root/thebuilddir/tmp/scmroot/kf5-kwindowsystem
Cloning into '/var/lib/mock/f31-build-65368-29700/root/thebuilddir/tmp/scmroot/kf5-kwindowsystem'...
$ git reset --hard 39558090ab50ab646d52849531d73e3d1a58787f
HEAD is now at 3955809 update %%files