Git client puts it's config in %homedrive%%homepath%. This is usual for Windows apps and breaks when homedrive disconnected. Use %appdata%\git

Set-GitUserConfigLocation.ps1

# %homedrive%%homepath% is weird and breaks when homedrive disconnected. Use %appdata%
# https://git-scm.com/docs/git-config#git-config-XDGCONFIGHOMEgitconfig
$ConfigDefaultLocation="$($env:homedrive)$($env:homedrive)\.gitconfig" # breaks when network drive isn't connected
$ConfigBetterLocation="$($env:appdata)\git\config" # Standard location for app data that you want to follow user
[System.Environment]::SetEnvironmentVariable('XDG_CONFIG_HOME', "$($env:appdata)",[System.EnvironmentVariableTarget]::user)
$env:XDG_CONFIG_HOME=[System.Environment]::GetEnvironmentVariable("XDG_CONFIG_HOME","User") 

# make better git data folder if not exists
New-Item -ItemType directory -Path "$($env:XDG_CONFIG_HOME)\git" -ErrorAction SilentlyContinue | out-null

# Move any existing git config from %homedrive%%homepath% to %appdata%\git
if (test-path -Path $ConfigDefaultLocation)
    {
    Move-Item -Path $ConfigDefaultLocation -destinaion $ConfigBetterLocation -Verbose
    }