Add fetch.pruneTags, diff.colorMoved, and diff.mnemonicPrefix from this
post:

https://blog.gitbutler.com/how-git-core-devs-configure-git/

Also clean up unused diff tools

diff --git a/.gitconfig b/.gitconfig
index 29881efb..ad0d22ef 100644
--- a/.gitconfig
+++ b/.gitconfig
@@ -7,6 +7,7 @@
 # remotes
 [fetch]
 	prune = true
+	pruneTags = true
 [pull]
 	rebase = true
 [push]
@@ -105,27 +106,12 @@
 	external = difft
 	; compactionHeuristic = true
 	indentHeuristic = true
-	colorMoved = default
+	colorMoved = dimmed-zebra
 	submodule = log
 	renames = copy
+	mnemonicPrefix = true
 [difftool]
 	prompt = false
-[difftool "sourcetree"]
-	cmd = opendiff \"$LOCAL\" \"$REMOTE\"
-[difftool "kaleidoscope"]
-	cmd = ksdiff --partial-changeset --relative-path \"$MERGED\" -- \"$LOCAL\" \"$REMOTE\"
-[difftool "icdiff"]
-	cmd = icdiff --line-numbers --no-bold \"$LOCAL\" \"$REMOTE\"
-[difftool "difftastic"]
-	cmd = difft "$LOCAL" "$REMOTE"
-[delta]
-	features = decorations
-	navigate = true
-	line-numbers = true
-	side-by-side = true
-	line-numbers-right-format = "│ "
-[delta "decorations"]
-	hunk-header-style = omit
 
 # merging
 [merge]