Work on build-tarball: Improve efficiency of "git clone".

Author: bhaible

build-tarball.sh

@@ -38,6 +38,7 @@ fi
 
 # Apply patches.
 (cd "$package" && patch -p1 < ../patches/tests.diff)
+(cd "$package" && patch -p1 < ../patches/0001-Improve-efficiency-of-git-clone.patch)
 
 if test $newest_gnulib = 1; then
   export GNULIB_SRCDIR=`pwd`/gnulib

patches/0001-Improve-efficiency-of-git-clone.patch

@@ -0,0 +1,25 @@
+From 36d78f8ca27e7fb24343d6922bfc0511d1ad84ce Mon Sep 17 00:00:00 2001
+From: Bruno Haible <bruno@clisp.org>
+Date: Mon, 8 Sep 2025 01:00:32 +0200
+Subject: [PATCH] Improve efficiency of "git clone".
+
+---
+ bootstrap-funclib.sh | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/bootstrap-funclib.sh b/bootstrap-funclib.sh
+index ba531140..ae459fdb 100644
+--- a/bootstrap-funclib.sh
++++ b/bootstrap-funclib.sh
+@@ -35,7 +35,7 @@ export LC_ALL
+ # Honor $PERL, but work even if there is none.
+ PERL="${PERL-perl}"
+ 
+-default_gnulib_url=https://git.savannah.gnu.org/git/gnulib.git
++default_gnulib_url=https://https.git.savannah.gnu.org/git/gnulib.git
+ 
+ # Copyright year, for the --version output.
+ copyright_year=`echo "$scriptlibversion" | sed -e 's/[^0-9].*//'`
+-- 
+2.50.1
+