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Adds a 'replace' reference in `refs/replace/` namespace.
-The name of the 'replace' reference is the SHA1 of the object that is
-replaced. The content of the 'replace' reference is the SHA1 of the
+The name of the 'replace' reference is the SHA-1 of the object that is
+replaced. The content of the 'replace' reference is the SHA-1 of the
replacement object.
Unless `-f` is given, the 'replace' reference must not yet exist.
-Replacement references will be used by default by all git commands
+Replacement references will be used by default by all Git commands
except those doing reachability traversal (prune, pack transfer and
fsck).