request-pull: state what commit to expect

The message gives a detailed explanation of the commit the requester based
the changes on, but lacks information that is necessary for the person who
performs a fetch & merge in order to verify that the correct branch was
fetched when responding to the pull request.

Add a few more lines to describe the commit at the tip expected to be
fetched to the same level of detail as the base commit.

Also update the warning message slightly when the script notices that the
commit may not have been pushed.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-request-pull.sh

@@ -35,7 +35,7 @@ do
 	shift
 done
 
-base=$1 url=$2 head=${3-HEAD}
+base=$1 url=$2 head=${3-HEAD} status=0
 
 test -n "$base" && test -n "$url" || usage
 baserev=$(git rev-parse --verify "$base"^0) &&
@@ -51,25 +51,29 @@ find_matching_branch="/^$headrev	"'refs\/heads\//{
 }'
 branch=$(git ls-remote "$url" | sed -n -e "$find_matching_branch")
 url=$(git ls-remote --get-url "$url")
-if test -z "$branch"
-then
-	echo "warn: No branch of $url is at:" >&2
-	git log --max-count=1 --pretty='tformat:warn:   %h: %s' $headrev >&2
-	echo "warn: Are you sure you pushed $head there?" >&2
-	echo >&2
-	echo >&2
-	branch=..BRANCH.NOT.VERIFIED..
-	status=1
-fi
 
 git show -s --format='The following changes since commit %H:
 
   %s (%ci)
 
-are available in the git repository at:' $baserev &&
+are available in the git repository at:
-echo "  $url $branch" &&
+' $baserev &&
-echo &&
+echo "  $url${branch+ $branch}" &&
+git show -s --format='
+for you to fetch changes up to %H:
+
+  %s (%ci)
+
+----------------------------------------------------------------' $headrev &&
 
 git shortlog ^$baserev $headrev &&
-git diff -M --stat --summary $patch $merge_base..$headrev || exit
+git diff -M --stat --summary $patch $merge_base..$headrev || status=1
+
+if test -z "$branch"
+then
+	echo "warn: No branch of $url is at:" >&2
+	git show -s --format='warn:   %h: %s' $headrev >&2
+	echo "warn: Are you sure you pushed '$head' there?" >&2
+	status=1
+fi
 exit $status

t/t5150-request-pull.sh

@@ -193,8 +193,14 @@ test_expect_success 'pull request format' '
 	  SUBJECT (DATE)
 
 	are available in the git repository at:
+
 	  URL BRANCH
 
+	for you to fetch changes up to OBJECT_NAME:
+
+	  SUBJECT (DATE)
+
+	----------------------------------------------------------------
 	SHORTLOG
 
 	DIFFSTAT