Allow limiting history in commmand

dotfiles/gittum/before.gitconfig

   com = checkout master
   cp = cherry-pick
   dc = !clear && git diff --cached
-  gr = log --graph --full-history --all --color\
+  gr = log --graph --full-history --color\
        --pretty=tformat:"%x1b[31m%h%x09%x1b[32m%d%x1b[0m%x20%s%x1b[0m"
-  grr = log --graph --full-history --all --color\
+  grr = log --graph --full-history --color\
         --pretty=tformat:"%x1b[31m%h%x09%x1b[32m%d%x1b[0m%x20%s%x1b[0m"\
         --simplify-by-decoration
   k = !sh -c \