$ git clone -n https://src.fedoraproject.org/rpms/lv2-c++-tools.git /var/lib/mock/f45-build-17788-504/root/chroot_tmpdir/scmroot/lv2-c++-tools
Cloning into '/var/lib/mock/f45-build-17788-504/root/chroot_tmpdir/scmroot/lv2-c++-tools'...
$ git fetch origin d1d0bd55bc86cb0c5ca1abfc46dd3dcdfdee1882:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lv2-c++-tools
 * [new ref]         d1d0bd55bc86cb0c5ca1abfc46dd3dcdfdee1882 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1d0bd5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild