$ git clone -n https://src.fedoraproject.org/rpms/fcitx-chewing.git /var/lib/mock/f41-build-side-1-2635152-26097/root/chroot_tmpdir/scmroot/fcitx-chewing
Cloning into '/var/lib/mock/f41-build-side-1-2635152-26097/root/chroot_tmpdir/scmroot/fcitx-chewing'...
$ git fetch origin 3849b9982338169b88e177115df156cacbde8509:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx-chewing
 * [new ref]         3849b9982338169b88e177115df156cacbde8509 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3849b99 convert GPLv2+ license to SPDX