$ git clone -n https://src.fedoraproject.org/rpms/nbd-runner.git /var/lib/mock/f39-build-1497747-34642/root/chroot_tmpdir/scmroot/nbd-runner
Cloning into '/var/lib/mock/f39-build-1497747-34642/root/chroot_tmpdir/scmroot/nbd-runner'...
$ git fetch origin 8fa71b4b86c31a374682310f5e4f72583b61bba5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nbd-runner
 * [new ref]         8fa71b4b86c31a374682310f5e4f72583b61bba5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8fa71b4 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild