fixed the case where the prefix of the tag could conflict

Author: jmlagace

git-autotag

@@ -2,7 +2,7 @@
 
 TARGET_PREFIX=${1:-release}
 TARGET_BASE=$TARGET_PREFIX-`date +%Y%m%d`
-TARGET_REVISION=$((`git ls-remote --tags --heads origin | awk "/$TARGET_BASE-(.*)/ { print $1 }" | awk -F'-' '{print $3}' | sort -nr | head -n 1` + 1))
+TARGET_REVISION=$((`git ls-remote --tags --heads origin | awk "/tags\/$TARGET_BASE-(.*)/ { print $1 }" | awk -F'-' '{print $3}' | sort -nr | head -n 1` + 1))
 TARGET_BRANCH=$TARGET_BASE-$TARGET_REVISION
 git tag $TARGET_BRANCH
 git push origin $TARGET_BRANCH