$ git clone -n https://src.fedoraproject.org/rpms/libdwarf.git /var/lib/mock/f45-build-16078-481/root/chroot_tmpdir/scmroot/libdwarf
Cloning into '/var/lib/mock/f45-build-16078-481/root/chroot_tmpdir/scmroot/libdwarf'...
$ git fetch origin c9f4bb6098007c00f5e5e5846b0e091126d4d9b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdwarf
 * [new ref]         c9f4bb6098007c00f5e5e5846b0e091126d4d9b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9f4bb6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild