Change versioning scheme.

Versions now only include commits that affect the template, rather than
all of them, to prevent spurious rebuilds. However, this also means that
we need an epoch, since the version number drastically decreased.

Thanks to Eli Schwarz, for recommending this over IRC.

PKGBUILD

@@ -1,6 +1,9 @@
 # Maintainer: Bert Peters <bert@bertptrs.nl>
 pkgname=munin-template-munstrap-git
-pkgver=r3632.c9157be3
+pkgver=r25.c3431051
+# Changed versioning scheme to prevent rebuilds
+# Thanks to eschwarz for recommending
+epoch=1
 pkgrel=1
 pkgdesc="Bootstrap based template for munin-html"
 arch=('any')
@@ -11,9 +14,10 @@ source=("${pkgname%-git}::git+https://github.com/munin-monitoring/contrib.git")
 md5sums=('SKIP')
 
 pkgver() {
+	local subdir="templates/munstrap"
 	cd "$srcdir/${pkgname%-git}"
 	# Git, no tags available
-	printf "r%s.%s" "$(git rev-list --count HEAD)" "$(git rev-parse --short HEAD)"
+	printf "r%s.%s" "$(git rev-list --count HEAD "$subdir")" "$(git log -n 1 --pretty=format:%h -- "$subdir")"
 }
 
 package() {