[PATCH v2 2/7] doc: explain fetchRemoteHEADWarn advice

[Matt Hunter <m@lfurio.us>]

When the user sets 'remote.<name>.followRemoteHEAD' to
'warn[-if-not-$branch]', git-fetch will report when a fetched HEAD
disagrees with the locally-configured remote's HEAD.  This additional
advice instructs the user how to deal with these warnings, but was
previously undocumented in git-config.

Signed-off-by: Matt Hunter <m@lfurio.us>
---
 Documentation/config/advice.adoc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/config/advice.adoc b/Documentation/config/advice.adoc
index 257db5891817..c3c190ba6a4f 100644
--- a/Documentation/config/advice.adoc
+++ b/Documentation/config/advice.adoc
@@ -48,6 +48,10 @@ all advice messages.
 		to create a local branch after the fact.
 	diverging::
 		Shown when a fast-forward is not possible.
+	fetchRemoteHEADWarn::
+		Shown when linkgit:git-fetch[1] reveals that a remote `HEAD`
+		differs from what is set locally and the user has opted into
+		receiving a warning in this situation.
 	fetchShowForcedUpdates::
 		Shown when linkgit:git-fetch[1] takes a long time
 		to calculate forced updates after ref updates, or to warn
-- 
2.54.0