dolt-fetch: add page (#8823)

pages/common/dolt-fetch.md

@@ -0,0 +1,16 @@
+# dolt fetch
+
+> Download objects and refs from another repository.
+> More information: <https://github.com/dolthub/dolt>.
+
+- Fetch the latest changes from the default remote upstream repository (origin):
+
+`dolt fetch`
+
+- Fetch latest changes from a specific remote upstream repository:
+
+`dolt fetch {{remote_name}}`
+
+- Update branches with the current state of the remote, overwriting any conflicting history:
+
+`dolt fetch -f`