$ git clone -n https://src.fedoraproject.org/rpms/k3b.git /var/lib/mock/f40-build-2392680-60530/root/chroot_tmpdir/scmroot/k3b
Cloning into '/var/lib/mock/f40-build-2392680-60530/root/chroot_tmpdir/scmroot/k3b'...
$ git fetch origin 1c6349690987fdb5b3b6466bc453235b6286be04:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/k3b
 * [new ref]         1c6349690987fdb5b3b6466bc453235b6286be04 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c63496 24.01.95