Point at a root directory and run `Update-Git`. Will recursively search subdirectories and fetch/pull all branches that don't start with `local`

Update-Git.ps1

function Write-Color($string,[switch]$nonewline) {
    # Reference:
    # 0 = Black
    # 1 = DarkBlue
    # 2 = DarkGreen
    # 3 = DarkCyan
    # 4 = DarkRed
    # 5 = DarkMagenta
    # 6 = DarkYellow
    # 7 = Gray
    # 8 = DarkGray
    # 9 = Blue
    # a = Green
    # b = Cyan
    # c = Red
    # d = Magenta
    # e = Yellow
    # f = White
    $sections = $string -split "~~"
    foreach ($section in $sections) {
        if ($section.length -eq 0) {continue}
        $color = [ConsoleColor]([Convert]::ToInt16($section[0], 16))
        write-host $section.substring(1) -foregroundcolor $color -nonewline
    }
    if(-not $nonewline) {
        write-host;
    }
}

function Update-Git($base,$lastlen) {
    $popd = $false
    $currbranch = $false
    $top=$false
    $pre = ""
    try {
        if(-not $base){$base = $pwd;[System.Console]::CursorVisible = $false;$top=$true}
        $baselen = $base.path.lastindexof("\")
        $pre = $pwd.path.substring($baselen, ($pwd.path.lastindexof("\")+1)-$baselen)
        $post = $pwd.path.substring($pwd.path.lastindexof("\")+1)
        $search = "Searching ...$pre$post";
        $len = $search.length;
        if($lastlen -gt $search.length) {$search += " " * ($lastlen - $search.length)}
        $search += "`r"
        write-host $search -foregroundcolor darkgray -nonewline;
        if (Test-path ".git" -type container) {
            write-host "Fetching $post     $(if($pre){" "*$pre.length})`r" -foregroundcolor yellow -nonewline;
            . git fetch -p 1>$fetch 2>$fetcherr;
            if ($lastexitcode -eq 0 -or ($fetcherr)) {
                if ($fetch) {
                    Write-Color "8`r...$pre~~f$post         "
                    $branches = . git branch 
                    $currbranch = $branches|?{$_.contains('*')}[0]
                    $currbranch = $currbranch.replace('*', '').trim()
                    $branches = $branches|% {$_.replace('*', '').trim()}
                    foreach ($branch in $branches) {
                        $prefix = "f`t["
                        if ($branch -like $currbranch) { $prefix += "~~a*" }
                        if ($branch.startswith("local")) {
                            write-color "$prefix~~8$branch~~f] ~~4(Skipping 'local' branch)"
                            continue
                        } else { write-color "$prefix~~b$branch~~f]" }
                        write-host "`tCheckout..." -foregroundcolor yellow -nonewline
                        . git checkout $branch *>$null
                        write-host "`r`tPulling... " -foregroundcolor yellow -nonewline
                        $stdout = . git pull 2>$null;
                        if ($LastExitCode -eq 0) {
                            $stdout = $stdout.trim() -split "`r`n" |% {$_.replace("`n", "`n`t  ")}
                            $stdout |%{write-host "`r`t> $_" -foregroundcolor green}
                        } else {
                            write-host "`r`t> Could not pull branch" -foregroundcolor red
                        }
                    }
                    . git checkout $currbranch *>$null
                    $currbranch = $false
                } else {
                    Write-Color "8`r...$pre~~f$post~~7 was up-to-date"
                }
            } else { # $LastExitCode -ne 0 -or $fetcherr
                write-color "4`r...$pre~~c$post~~4 Could not be fetched: 0x$([Convert]::ToString($LastExitCode, 16))"
            }
        }
        foreach ($dir in (ls -Directory)) {
            pushd $dir.Name;
            $popd = $true
            Update-Git $base $len;
            popd;
            $popd = $false
        }
        write-host "`r$(" "*$len)`r" -nonewline
    } finally {
        write-host "`r$(" "*$len)`r" -nonewline
        if ($currbranch) { . git checkout $currbranch *>$null }
        if ($popd) { popd }
        if($top){
            [System.Console]::CursorVisible = $true
        }
    }
}