Index: head/tools/tools/git/hooks/prepare-commit-msg
===================================================================
--- head/tools/tools/git/hooks/prepare-commit-msg
+++ head/tools/tools/git/hooks/prepare-commit-msg
@@ -0,0 +1,55 @@
+#!/bin/sh
+
+case "$2" in
+commit|message)
+	# It appears git invokes this script for interactive rebase but does
+	# not remove commented lines, so just exit if we're not called with the
+	# default (comment-containing) template.
+	egrep -q '^#' "$1" || return 0
+	;;
+template)
+	return 0
+	;;
+merge)
+	return 0
+	;;
+esac
+
+outfile=$(mktemp /tmp/freebsd-git-commit.XXXXXXXX)
+cat >$outfile <<EOF
+
+$(awk '1;/^#$/{exit}' $1)
+# Uncomment and complete these metadata fields, as appropriate:
+# 
+# PR:		
+# Submitted by:	
+# Reported by:	
+# Reviewed by:	
+# Approved by:	
+# Obtained from:	
+# MFC after:	
+# MFH:		
+# Relnotes:	
+# Security:	
+# Sponsored by:	
+# Pull Request:	
+# Differential Revision:	
+#
+# Description of fields to fill in above:                 72 columns --|
+# PR:                       If and which Problem Report is related.
+# Submitted by:             If someone else sent in the change.
+# Reported by:              If someone else reported the issue.
+# Reviewed by:              If someone else reviewed your modification.
+# Approved by:              If you needed approval for this commit.
+# Obtained from:            If the change is from a third party.
+# MFC after:                N [day[s]|week[s]|month[s]].  Request a reminder email.
+# MFH:                      Ports tree branch name.  Request approval for merge.
+# Relnotes:                 Set to 'yes' for mention in release notes.
+# Security:                 Vulnerability reference (one per line) or description.
+# Sponsored by:             If the change was sponsored by an organization.
+# Pull Request:             https://github.com/freebsd/<repo>/pull/### (*full* GitHub URL needed).
+# Differential Revision:    https://reviews.freebsd.org/D### (*full* phabric URL needed).
+$(awk '/^#$/,EOF' $1)
+EOF
+
+mv $outfile $1