$ git clone -n https://src.fedoraproject.org/rpms/libmnl.git /var/lib/mock/f45-build-16563-487/root/chroot_tmpdir/scmroot/libmnl
Cloning into '/var/lib/mock/f45-build-16563-487/root/chroot_tmpdir/scmroot/libmnl'...
$ git fetch origin f5667a4822a630d4b861ad68091fd4e5002ee9f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmnl
 * [new ref]         f5667a4822a630d4b861ad68091fd4e5002ee9f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5667a4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild