$ git clone -n https://src.fedoraproject.org/rpms/fcitx-chewing.git /var/lib/mock/f39-build-1501411-34835/root/chroot_tmpdir/scmroot/fcitx-chewing
Cloning into '/var/lib/mock/f39-build-1501411-34835/root/chroot_tmpdir/scmroot/fcitx-chewing'...
$ git fetch origin ead4e01ffa7e1f5fc6da260f97510b2e6656b5df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx-chewing
 * [new ref]         ead4e01ffa7e1f5fc6da260f97510b2e6656b5df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ead4e01 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild