How to merge bugfix from master?

Hi, I am newbee of rocksdb and try to develop some feature based on release tag: v6.0.2, but there are some compile error which is fixed in master branch, so I want to know the official process how to merge specific commit (bugfix) from master?

I see some fix's content is the same but commit hash differs, just like `68a2f94d5` in master, and `524609d2b12c46f651312a0f707688a03bc52c24` in 6.0.fb branch, this confuse me.

Thanks a lot!