git svn dcommit doesn't work with useSvnsyncProps

Hi list.
Things often go wrong with git svn. Often you have to try different svn layouts and path ignores.
This is why I prefer to do the long lasting svn mirror once and then clone the mirror to git with --use-svnsync-props. Why use this option at all? Because without it the commits have different commit message and are are valid only on local machine.

Till now I only imported from svn and never exported. And today I get this:

    $ git svn info # or rebase, or dcommit
    Unable to determine upstream SVN information

I found a workaround:
- delete .git/svn/.metadata (once).
- to do 'git svn dcommit' temporarily change the svn url to the real one
- to do 'git svn fetch' temporarily change the svn url to the mirror

or
- import a few commits from the upstream svn repo to init the metadata
- switch to the mirror

test script:

testdir=mktemp -d
echo "testdir = $testdir"
cd "$testdir"

pushurl="file://$testdir/test.svn"
echo "creating repo test.svn"
svnadmin create test.svn
svn mkdir -m "" "$pushurl/trunk" "$pushurl/tags" "$pushurl/branches"

echo "checking out"
svn checkout "$pushurl/trunk" "test"
cd "test"

echo "committing"
echo x > f
svn add f
svn commit -mx >/dev/null

svn cp -m"create testbranch" "$pushurl/trunk" "$pushurl/branches/testbranch"

for ((i=0; i<4; i++)); do
echo $i > f
svn commit -m"$i" >/dev/null
done

svn cp -m"create testtag" "$pushurl/trunk" "$pushurl/tags/testtag"

cd ..
rm -rf test

mkdir gitsvn
cd gitsvn

rourl=file://pwd/test.svn

svnadmin create "test.svn"
echo '#!/bin/sh' > "test.svn/hooks/pre-revprop-change" chmod +x "test.svn/hooks/pre-revprop-change"

svnsync init "$rourl" "$pushurl"
svnsync sync "$rourl"

git svn init --stdlayout $pushurl test
cd test
git config svn-remote.svn.pushurl "$pushurl"

# need to fetch one revision from pushurl for proper metadata init git svn fetch --revision BASE:1

# switching to mirror
git config svn-remote.svn.useSvnsyncProps 1
git config svn-remote.svn.url "$rourl"

# hiding real repo
mv $testdir/test.svn{,.1}

# feetching from mirror
git svn fetch

# restoring real repo
mv $testdir/test.svn{.1,}

# here's the error: Unable to determine upstream SVN information from working tree history git svn info
git svn rebase

# switching to real repo
git config svn-remote.svn.useSvnsyncProps 0
git config svn-remote.svn.url "$pushurl"

# now it works:
git svn info
git svn rebase