
I think it should be more like the octicons one: https://octicons.github.com/icon/git-pull-request/
Here is a version that adapts the current to the octicon structure:
<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
<path fill-rule="evenodd" clip-rule="evenodd" d="M4.03893 4.99056C4.03893 4.99056 4.35057 4.91224 4.49892 4.85054C4.95516 4.6608 5.34497 4.34017 5.61906 3.92903C5.89316 3.51789 6.03926 3.03474 6.03893 2.54061C6.0463 2.19765 5.98157 1.85696 5.84892 1.54061C5.72425 1.23755 5.54075 0.962142 5.30904 0.730425C5.07732 0.498708 4.80197 0.315179 4.49892 0.190508C4.18256 0.0578651 3.84188 -0.00680644 3.49892 0.000566441C3.00479 0.000236948 2.52166 0.146394 2.11052 0.420488C1.69938 0.694583 1.37867 1.08436 1.18892 1.54061C1.00092 1.9984 0.951865 2.50141 1.0479 2.98689C1.14393 3.47238 1.3808 3.91884 1.72893 4.27059C2.07944 4.61279 2.5198 4.84851 2.99892 4.95052V10.04C2.5198 10.142 2.07944 10.3778 1.72893 10.72C1.3808 11.0717 1.14393 11.5182 1.0479 12.0037C0.951865 12.4891 1.00092 12.9922 1.18892 13.45C1.37867 13.9062 1.69938 14.296 2.11052 14.5701C2.52166 14.8442 3.00479 14.9903 3.49892 14.99C3.84188 14.9974 4.18256 14.9327 4.49892 14.8001C4.80197 14.6754 5.07732 14.4919 5.30904 14.2601C5.54075 14.0284 5.72425 13.753 5.84892 13.45C5.98157 13.1336 6.0463 12.7929 6.03893 12.45C6.03926 11.9558 5.89316 11.4727 5.61906 11.0615C5.34497 10.6504 4.95516 10.3298 4.49892 10.14C4.35057 10.0783 4.19649 10.0314 4.03893 10V4.99056ZM2.70894 3.74056C2.95497 3.90376 3.24368 3.99072 3.53893 3.99056C3.81026 3.99066 4.07654 3.91718 4.3094 3.77791C4.54227 3.63864 4.73301 3.43877 4.86128 3.19966C4.98956 2.96056 5.05057 2.69116 5.03783 2.42012C5.02508 2.14908 4.93907 1.88661 4.78893 1.6606C4.62119 1.4121 4.38499 1.21751 4.10893 1.10054C3.83645 0.989551 3.53719 0.961759 3.24892 1.02059C2.95693 1.07705 2.68852 1.2196 2.47823 1.42989C2.26793 1.64018 2.12539 1.90853 2.06892 2.20052C2.0101 2.4888 2.03792 2.78802 2.14891 3.0605C2.26588 3.33656 2.46043 3.57282 2.70894 3.74056ZM2.70894 11.25C2.95497 11.0868 3.24368 10.9998 3.53893 11C3.81026 10.9999 4.07654 11.0734 4.3094 11.2127C4.54227 11.3519 4.73301 11.5518 4.86128 11.7909C4.98956 12.03 5.05057 12.2994 5.03783 12.5704C5.02508 12.8415 4.93907 13.1039 4.78893 13.33C4.62119 13.5785 4.38499 13.7731 4.10893 13.89C3.83645 14.001 3.53719 14.0288 3.24892 13.97C2.95693 13.9135 2.68852 13.771 2.47823 13.5607C2.26793 13.3504 2.12539 13.082 2.06892 12.79C2.0101 12.5018 2.03792 12.2025 2.14891 11.9301C2.26588 11.654 2.46043 11.4177 2.70894 11.25Z" fill="#C5C5C5"/>
<path d="M14.309 10.7206C13.9612 10.3747 13.5196 10.1384 13.0389 10.0406V4.4906C13.0403 4.16193 12.9765 3.83626 12.8513 3.53235C12.7262 3.22844 12.542 2.95226 12.3096 2.71985C12.0772 2.48744 11.8011 2.30339 11.4972 2.17822C11.1933 2.05305 10.8676 1.98928 10.5389 1.9906H8.68899L9.95895 0.720581L9.24899 0.0106201L7.11896 2.14062V2.84058L9.24899 4.97058L9.95895 4.26062L8.68899 2.9906H10.5389C10.9368 2.9906 11.3183 3.14863 11.5996 3.42993C11.8809 3.71124 12.0389 4.09278 12.0389 4.4906V10.0406C11.7204 10.1028 11.4177 10.2286 11.1489 10.4106C10.7412 10.688 10.4218 11.0768 10.2289 11.5306C10.0381 11.988 9.98749 12.4917 10.0835 12.9779C10.1795 13.4641 10.4179 13.9108 10.7683 14.2612C11.1187 14.6117 11.5654 14.85 12.0516 14.946C12.5378 15.0421 13.0416 14.9915 13.499 14.8007C13.9552 14.6109 14.345 14.2902 14.6191 13.879C14.8932 13.4679 15.0393 12.9847 15.0389 12.4906C15.039 11.8273 14.7766 11.191 14.309 10.7206ZM13.5989 13.5507C13.3542 13.7956 13.0324 13.9483 12.6879 13.9829C12.3434 14.0175 11.9975 13.9319 11.7089 13.7406C11.4604 13.5729 11.2659 13.3366 11.1489 13.0605C11.0379 12.7881 11.0101 12.4888 11.069 12.2006C11.1254 11.9086 11.268 11.6402 11.4783 11.4299C11.6886 11.2196 11.957 11.0771 12.249 11.0206C12.5372 10.9618 12.8365 10.9896 13.1089 11.1006C13.385 11.2176 13.6212 11.4121 13.7889 11.6606C13.9803 11.9492 14.0659 12.295 14.0312 12.6395C13.9966 12.984 13.8439 13.306 13.5989 13.5507Z" fill="#C5C5C5"/>
</svg>
Good catch and thanks for making the icon! I'll update it with your proposal.
This is now updated:


This had to get reverted due to some conflicts. Re-opening so that I can follow up.
Most helpful comment
Good catch and thanks for making the icon! I'll update it with your proposal.