tweaked subject layout

diff --cc scripts/post-receive-email-with-diffs
index 66a7bd2,c6d238b..7723e58
--- 1/scripts/post-receive-email-with-diffs
--- 2/scripts/post-receive-email-with-diffs
+++ b/scripts/post-receive-email-with-diffs
@@@ -193,8 -185,9 +193,15 @@@ generate_email_header(
      else
        details="$refname_type, $short_refname,"
      fi
++    # trying to improve the layout of $describe
++    # in some cases we get a plain hash, some other times we're getting a composite like
++    # TagName-NumOfCommitsAfterTag-Hash
++    # simple first idea: if it looks like a plain hash, truncate it, 
++    # otherwise preserve as-is for now
      local shortrev
-     is_hash $describe && shortrev="$(cut -b1-8 <<< $describe).." || shortrev=$describe
 -    # git describe format: TagName-NumOfCommitsAfterTag-Hash
 -    shortrev=$(echo $describe | awk -F - '{print $NF;}' | cut -b1-8)
++#    shortrev=$(awk -F - '{print $NF;}' <<< $describe)
++    shortrev=$describe
++    is_hash $shortrev && shortrev="$(cut -b1-8 <<< $shortrev).." 
      # Generate header
      cat <<-EOF
        To: $recipients