Try to deal with PR flow test
Try to deal with PR flow test

When Jenkins handles a PR it does a merge which creates a local commit.
We can't reference that commit id from the flow directory since it doesn't
exist in github.  This tries to setup the local git as a remote repo
so we can fetch that change and check it out.

The-OpenROAD-Project/OpenROAD,The-OpenROAD-Project/OpenROAD,The-OpenROAD-Project/OpenROAD,QuantamHD/OpenROAD,QuantamHD/OpenROAD,QuantamHD/OpenROAD,QuantamHD/OpenROAD,The-OpenROAD-Project/OpenROAD,The-OpenROAD-Project/OpenROAD,QuantamHD/OpenROAD