$ git clone -n https://src.fedoraproject.org/rpms/krdc.git /var/lib/mock/f40-build-2087257-50154/root/chroot_tmpdir/scmroot/krdc
Cloning into '/var/lib/mock/f40-build-2087257-50154/root/chroot_tmpdir/scmroot/krdc'...
$ git fetch origin 4a3dad9bb15ee8de31deeec0936b96e3e6fc4bd6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/krdc
 * [new ref]         4a3dad9bb15ee8de31deeec0936b96e3e6fc4bd6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a3dad9 Revert to KF5