[aur-general] pkgversion() not working

[Storm Dragon]

Hi,
I was trying to update my PKGBUILD for talking-clock to get the version from 
git, but it keeps failing and saying the directory doesn't exist. When I check 
though, the directory does exist. Can someone please take a look and tell me 
what I have done wrong?
Thanks
Storm
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# Contributor: Storm Dragon <stormdragon2...@gmail.com>
pkgname=talking-clock-git
pkgver=2
pkgrel=1
pkgdesc="Highly configurable clock written in bash with soundpack and voice 
options."
arch=('any')
url="http://github.com/stormdragon2976/talking-clock";
license=('GPL2')
depends=('bash')
makedepends=('git')
optdepends=('espeak: TTS support'
        'festival: TTS support'
        'speech-dispatcher: TTS support'
        'svox-pico-git: TTS support'
        'pulseaudio: Chime sound support'
        'sox: Chime sound support'
        'vorbis-tools: Chime sound support'
        'torsocks: Get temperature information anonymously using torify'
'yad: for talking-clock-gui to work')

_gitroot="git://github.com/stormdragon2976/talking-clock.git"
_gitname="talking-clock"

build()
{
msg "Connecting to the Git repository..."
  
if [[ -d "$srcdir/$_gitname" ]] ; then
    cd "$_gitname"
    git pull origin
    msg "The local files are updated"
  else
    git clone --depth 1 $_gitroot
  fi

}

pkgver()
{
  cd "$srcdir/$_gitname"
  git describe --long --tags | sed -r 's/([^-]*-g)/r\1/;s/-/./g'
}
 
package()
 {
  msg "Starting to build the package..."

  cd "$srcdir/$_gitname"
  install -d "$pkgdir/usr/bin"
 install -d "$pkgdir/usr/share/talking-clock"
  install -m755 "src/talking-clock" "$pkgdir/usr/bin"
  install -m755 "talking-clock-gui/talking-clock-gui" "$pkgdir/usr/bin"
  install -m666 "README" "$pkgdir/usr/share/talking-clock"
  install -m666 "src/bell.ogg" "$pkgdir/usr/share/talking-clock"
  }

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