Install always latest version of git

tools/docker/Dockerfile

@@ -4,6 +4,9 @@ ARG DEBIAN_FRONTEND=noninteractive
 
 # We need libpython2.7 due to GDB tools
 RUN : \
+  && apt-get update \
+  && apt-get install -y software-properties-common \
+  && add-apt-repository -y ppa:git-core/ppa \
   && apt-get update \
   && apt-get install -y \
     apt-utils \