$ git clone -n https://src.fedoraproject.org/rpms/fcitx5-mozc.git /var/lib/mock/f39-build-1852327-42293/root/chroot_tmpdir/scmroot/fcitx5-mozc
Cloning into '/var/lib/mock/f39-build-1852327-42293/root/chroot_tmpdir/scmroot/fcitx5-mozc'...
$ git fetch origin db1c9e51c27018e3c1b89761aceaca86ccf8b587:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx5-mozc
 * [new ref]         db1c9e51c27018e3c1b89761aceaca86ccf8b587 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db1c9e5 Fix the build issue with newer abseil.