--- OLD/pretty.c	Thu Jan  1 00:00:00 1970
+++ NEW/pretty.c	Thu Jan  1 00:00:00 1970
@@ -8,6 +8,8 @@
 #include "log-tree.h"
 #include "color.h"
 
+int abbrev_length = DEFAULT_ABBREV;
+
 static char *user_format;
 
 static void save_user_format(struct rev_info *rev, const char *cp, int is_tformat)
@@ -647,7 +649,7 @@
 		if (add_again(sb, &c->abbrev_commit_hash))
 			return 1;
 		strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
-		                                     DEFAULT_ABBREV));
+		                                     abbrev_length));
 		c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
 		return 1;
 	case 'T':		/* tree hash */
@@ -657,7 +659,7 @@
 		if (add_again(sb, &c->abbrev_tree_hash))
 			return 1;
 		strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
-		                                     DEFAULT_ABBREV));
+		                                     abbrev_length));
 		c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
 		return 1;
 	case 'P':		/* parent hashes */
@@ -674,7 +676,7 @@
 			if (p != commit->parents)
 				strbuf_addch(sb, ' ');
 			strbuf_addstr(sb, find_unique_abbrev(
-					p->item->object.sha1, DEFAULT_ABBREV));
+					p->item->object.sha1, abbrev_length));
 		}
 		c->abbrev_parent_hashes.len = sb->len -
 		                              c->abbrev_parent_hashes.off;