fix getting the target branch name

[qinyer]

Signed-off-by: qinyer qy913726062@gmail.com

What type of PR is this?

/kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Special notes for reviewers:

Does this PR introduced a user-facing change?

Additional documentation, usage docs, etc.:

[kubeclipper-bot]

@qinyer: Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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[codecov-commenter]

Codecov Report

Merging #357 (bf60cf1) into master (d0f93c2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #357   +/-   ##
=======================================
  Coverage   12.87%   12.87%           
=======================================
  Files         102      102           
  Lines       15734    15734           
=======================================
  Hits         2025     2025           
  Misses      13467    13467           
  Partials      242      242           

[lixd]

/lgtm

[kubeclipper-bot]

LGTM label has been added.

Git tree hash: 2b355f31d83a0300aa50fd84e00041e48bbe3ab9

[x893675]

/approve

[kubeclipper-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lixd, qinyer, x893675

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