work around for ndbroadbent/scm_breeze#27

lib/git/repo_index.sh

@@ -166,8 +166,11 @@ function _git_index_count() {
 }
 
 # Returns the current git branch (returns nothing if not a git repository)
-parse_git_branch() {
-  \git branch 2> /dev/null | sed "s/^\* \([^ ]*\)/\1/;tm;d;:m"
+function is_git_dirty {
+    [[ $(git status 2> /dev/null | tail -n1) != "nothing to commit (working directory clean)" ]] && echo "*"
+ }
+function parse_git_branch {
+    git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/[\1$(is_git_dirty)]/"
 }
 
 # If the working directory is clean, update the git repository. Otherwise, show changes.