gitconfig: added new command retag

Signed-off-by: Marcin Woźniak <y0rune@aol.com>

.gitconfig.local

@@ -31,6 +31,7 @@
     exclude-file = !git update-index --assume-unchanged
     c = commit --author='Marcin Woźniak <y0rune@aol.com> -s'
     cw = commit --author='Marcin Woźniak <marcin.wozniak@wundermanthompson.com> -s'
+    retag = "!f() { if [ -z \"$1\" ]; then echo \"No version provided. Skipping git push.\"; else git tag --delete $1 2>/dev/null; git tag -a $1 -m \"Version $1\"; git push --tags -f; git push -f; fi; }; f"
 
 [url "git@github.com:"]
     insteadOf = "https://github.com/"