$ git clone -n https://src.fedoraproject.org/rpms/libnbd.git /var/lib/mock/f41-build-811071-147141/root/chroot_tmpdir/scmroot/libnbd
Cloning into '/var/lib/mock/f41-build-811071-147141/root/chroot_tmpdir/scmroot/libnbd'...
$ git fetch origin f130496e84014107f6c72f844eb4f8d488e8f18e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnbd
 * [new ref]         f130496e84014107f6c72f844eb4f8d488e8f18e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f130496 OCaml 5.2.0 for Fedora 41