Don't use VCS::GIT::Branch as a command argument

    + gmake RELNAME=master@0f1eea0 AUTOCONF=autoconf dist
    /home/chkbuild/.rbenv/versions/3.4.8/bin/ruby --disable=gems  ./tool/make-snapshot \
    -srcdir=. -packages=gzip,zip,all \
    -unicode-version=17.0.0 \
    tmp master@0f1eea09490
    Exporting master@0f1eea09490
    Cloning into '/home/chkbuild/chkbuild/tmp/build/20260121T093003Z/tmp/ruby-snapshot20260121-3800606-t2y44s/ruby'...
    done.
    fatal: bad revision '#<struct VCS::GIT::Branch to_str="master">'
    fatal: bad revision '#<struct VCS::GIT::Branch to_str="master">'
    ./tool/make-snapshot:399: warning: no starting commit found

Author: etiennebarrie

tool/make-snapshot

@@ -396,7 +396,7 @@ def package(vcs, rev, destdir, tmp = nil)
 
   Dir.chdir(v) do
     unless File.exist?("ChangeLog")
-      vcs.export_changelog(url, nil, revision, "ChangeLog")
+      vcs.export_changelog(url.to_str, nil, revision, "ChangeLog")
     end
 
     unless touch_all(modified, "**/*", File::FNM_DOTMATCH)