This interview with Linus Torvalds about the creation of the Linux Kernel and Git Version Control discusses the reasons why Mr. Torvalds created Git instead of using the version control software existing at that time. At approximately 8:10, Mr. Torvalds says:
And there are complete projects that only maintain the source code. CVS
is the one that used to be the most used, and hated CVS
with passion and refused to touch it and tried something more than
it was radical and interesting and everyone else hated.
He goes on to say that this experience led to the creation of Git.
What was the "radical and interesting" version control software that Mr. Torvalds tried to use for the Linux kernel, but which the community "hated"?