document move/copy --fast and --force

There was documentation in 7a3aafe76274a9e54395acb8ec2ce351888495de,
but it was lost in the man page split.

I don't know if this --force is very useful. Considered removing it
instead..

2 files changed, 18 insertions, 3 deletions

diff --git a/doc/git-annex-copy.mdwn b/doc/git-annex-copy.mdwn
index 50b407c3c..ecf78e905 100644
--- a/doc/git-annex-copy.mdwn
+++ b/doc/git-annex-copy.mdwn
@@ -37,12 +37,15 @@ Copies the content of files from or to another remote.
 
 * `--fast`
 
-  Avoid contacting the remote to check if it has every file when copying
-  --to it.
+  When copying content to a remote, avoid a round trip to check if the remote
+  already has content. This can be faster, but might skip copying content
+  to the remote in some cases.
 
 * `--force`
 
-  Force checking the remote for every file when copying --from it.
+  When copying content from a remote, ignore location tracking information
+  and always check if the remote has content. Can be useful if the location
+  tracking information is out of date.
 
 * `--all`
 
diff --git a/doc/git-annex-move.mdwn b/doc/git-annex-move.mdwn
index 6bf24309b..0aa349dee 100644
--- a/doc/git-annex-move.mdwn
+++ b/doc/git-annex-move.mdwn
@@ -53,6 +53,18 @@ Moves the content of files from or to another remote.
 
   Use this option to move a specified key.
 
+* `--fast`
+
+  When moving content to a remote, avoid a round trip to check if the remote
+  already has content. This can be faster, but might skip moving content
+  to the remote in some cases.
+
+* `--force`
+
+  When moving content from a remote, ignore location tracking information
+  and always check if the remote has content. Can be useful if the location
+  tracking information is out of date.
+
 * file matching options
 
   The [[git-annex-matching-options]](1)