From 493856f1b3051cb836b44ab48dcb9804513fbf4d Mon Sep 17 00:00:00 2001
From: Mark Wooding <mdw@distorted.org.uk>
Date: Fri, 10 Apr 2020 17:51:22 +0100
Subject: [PATCH] mdw/build: Check out the `mdw-build' branch by hand.

Later versions of Git leave the working tree empty after `git checkout
-b'.  Instead, just go through the necessary motions using the plumbing-
level commands.
---
 bin/mdw-build | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/bin/mdw-build b/bin/mdw-build
index 2af71e3..6a5a28a 100755
--- a/bin/mdw-build
+++ b/bin/mdw-build
@@ -302,7 +302,10 @@ case "$checkout" in
     run git clone -sn $srcpath/.git _source
     assign srcpath $releasepath/_source
     cd $srcpath
-    run git checkout -b mdw-build $checkoutrev
+    run git update-ref refs/heads/mdw-build $checkoutrev ""
+    run git symbolic-ref HEAD refs/heads/mdw-build
+    run git read-tree --reset refs/heads/mdw-build
+    run git checkout-index -afu
     assign gitversion "$(git describe --abbrev=4)"
     ;;
 esac
-- 
2.11.0