$ git clone -n https://src.fedoraproject.org/rpms/fcitx5-m17n.git /var/lib/mock/f40-build-1931899-25123/root/chroot_tmpdir/scmroot/fcitx5-m17n
Cloning into '/var/lib/mock/f40-build-1931899-25123/root/chroot_tmpdir/scmroot/fcitx5-m17n'...
$ git fetch origin 26821d673948a314d00f444c26d554d00ac8868b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx5-m17n
 * [new ref]         26821d673948a314d00f444c26d554d00ac8868b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26821d6 update to upstream release 5.1.1