Git for Windows doesn't execute my .bashrc file
OK, I found out the problem. Quite simply, the bash terminal used by the latest Git for Windows 2.5.0 (mintty) doesn't bother to read .bashrc - it reads .bash_profile. So you can set up your environment in .bash_profile and/or put this code at the start to read .bashrc:
if [ -f ~/.bashrc ]then . ~/.bashrcfi