How do I change file names introduced to SCCS

[Doug Gwyn]

In article <1990Oct30.125900.14693 at resam.dk> andrew at resam.dk (Leif Andrew Rump) writes:
- I introduced a file some time ago into SCCS called xyz.c,
- now I want to change it's name to abc.c - how is it done?
- I would like to keep the file history - so SCCS will give
- me the right file depending on which version I retrieve.

cp s.xyz.c s.abc.c