$ git clone -n https://src.fedoraproject.org/rpms/systemd.git /var/lib/mock/f29-build-4698-1105/root/thebuilddir/tmp/scmroot/systemd
Cloning into '/var/lib/mock/f29-build-4698-1105/root/thebuilddir/tmp/scmroot/systemd'...
$ git reset --hard b59ff1a2fcd31f4468220e1c162e2dfdd69c2e66
HEAD is now at b59ff1a Backport a bunch of patches