git-convert-refs

#!/bin/sh

. $(git --exec-path)/git-sh-setup
svn_prefix='svn/'

convert_ref(){
    echo -n "converting: $1 to: $2 ..."
    git update-ref $2 $1
    git update-ref -d $1
    echo "done"
}

get_refs(){
    git for-each-ref $1 --format='%(refname)'
}

echo 'Converting svn tags'
get_refs refs/remotes/${svn_prefix}tags | while read svn_tag
do
    new_ref=$(echo $svn_tag | sed -e "s|remotes/$svn_prefix||")
    convert_ref $svn_tag $new_ref
done

echo "Converting svn branches"
get_refs refs/remotes/${svn_prefix} | while read svn_branch
do
    new_ref=$(echo $svn_branch | sed -e "s|remotes/$svn_prefix|heads/|")
    convert_ref $svn_branch $new_ref
done