The Github repository for the community fork of Terraform (called OpenTF) has been made public. If you use any third-party tooling (SpaceLift, Scalr, Env0, Terraspace, Terragrunt, Atlantis, Digger, etc.) you will probably want to plan a switch to using OpenTF instead of Terraform to remain license compliant. Well, it is actually more about the third-party tool's compliance. From this point forward, their documentation can't tell you to install a version of Terraform higher then 1.5.5. You will start to see them transition over to suggesting OpenTF instead, once a stable release is available.
OpenTF plans to remain feature compatible with Terraform, but I could see, in the future, new features being added to OpenTF that third-party tool providers require.
I wouldn't compile and use the current OpenTF code for production or even development use yet, but if you wanted to contribute to the project, now is your chance.
https://github.com/opentffoundation/opentf
The first stable release should be coming by October 1st.
https://github.com/opentffoundation/opentf/milestone/3