$ git clone -n https://src.fedoraproject.org/rpms/libnl3.git /var/lib/mock/f45-build-16649-489/root/chroot_tmpdir/scmroot/libnl3
Cloning into '/var/lib/mock/f45-build-16649-489/root/chroot_tmpdir/scmroot/libnl3'...
$ git fetch origin 8344cfcbca904b4a6d6ea4a962360019f0827b0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnl3
 * [new ref]         8344cfcbca904b4a6d6ea4a962360019f0827b0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8344cfc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild