$ git clone -n https://src.fedoraproject.org/rpms/kf6-ki18n.git /var/lib/mock/f40-build-2540541-61859/root/chroot_tmpdir/scmroot/kf6-ki18n
Cloning into '/var/lib/mock/f40-build-2540541-61859/root/chroot_tmpdir/scmroot/kf6-ki18n'...
$ git fetch origin 7558c146e14bdcf492ba856d931d2c87bd2b85e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-ki18n
 * [new ref]         7558c146e14bdcf492ba856d931d2c87bd2b85e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7558c14 6.0.0