$ git clone -n https://src.fedoraproject.org/rpms/kblocks.git /var/lib/mock/f40-build-2725293-73114/root/chroot_tmpdir/scmroot/kblocks
Cloning into '/var/lib/mock/f40-build-2725293-73114/root/chroot_tmpdir/scmroot/kblocks'...
$ git fetch origin cb496612cca9daae2cc19d8d632e9b87b79f4421:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kblocks
 * [new ref]         cb496612cca9daae2cc19d8d632e9b87b79f4421 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb49661 24.02.2