$ git clone -n https://src.fedoraproject.org/rpms/libnbd.git /var/lib/mock/f40-build-2278604-55270/root/chroot_tmpdir/scmroot/libnbd
Cloning into '/var/lib/mock/f40-build-2278604-55270/root/chroot_tmpdir/scmroot/libnbd'...
$ git fetch origin 262c25de1f88eec44e4ec076c0037123a968b830:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnbd
 * [new ref]         262c25de1f88eec44e4ec076c0037123a968b830 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 262c25d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild