Fix git log command to while processing Commit position in SVNFindRev method

tools/auto_bisect/source_control.py

Index: tools/auto_bisect/source_control.py
diff --git a/tools/auto_bisect/source_control.py b/tools/auto_bisect/source_control.py
index fd3c4e336c929c4d02279d3ca7a5f34236824216..27bd7ba88f74f74f13251a181fc6ef95c857a862 100644
--- a/tools/auto_bisect/source_control.py
+++ b/tools/auto_bisect/source_control.py
@@ -230,7 +230,7 @@ class GitSourceControl(SourceControl):
     # TODO(prasadv): Use an appropriate command to find commit position instead
     # of parsing the log. Resolve this once 407316 is fixed.
     commit_position_pattern = 'Cr-Commit-Position: .*@\{#(?P<commit>[0-9]+)\}'
-    cmd = ['log', '--format=%b', '-1', 'origin/master', git_revision]
+    cmd = ['log', '--format=%b', '-1', git_revision]
     output = bisect_utils.CheckRunGit(cmd, cwd=cwd)
     if output:
       version_re = re.compile(commit_position_pattern)