watch: Fix 400 while trying to watch a commit.
watch: Fix 400 while trying to watch a commit.

This bug is caused by 412ff1984128f70a561d70ab69831d30dbffa7ec

ihoneymon/yobi,naver/yobi,doortts/forked-for-history,ChangsungKim/TestRepository01,oolso/yobi,yona-projects/yona,violetag/demo,doortts/forked-for-history,doortts/forked-for-history,Limseunghwan/oss,ahb0327/yobi,Limseunghwan/oss,doortts/fork-yobi,ahb0327/yobi,naver/yobi,yona-projects/yona,bloodybear/yona,bloodybear/yona,ihoneymon/yobi,ahb0327/yobi,doortts/fork-yobi,doortts/fork-yobi,oolso/yobi,violetag/demo,brainagenet/yobi,naver/yobi,brainagenet/yobi,bloodybear/yona,yona-projects/yona,doortts/fork-yobi,Limseunghwan/oss,yona-projects/yona,ChangsungKim/TestRepository01,ihoneymon/yobi,bloodybear/yona,oolso/yobi,brainagenet/yobi