$ git clone -n https://src.fedoraproject.org/rpms/libcircle.git /var/lib/mock/f45-build-15996-481/root/chroot_tmpdir/scmroot/libcircle
Cloning into '/var/lib/mock/f45-build-15996-481/root/chroot_tmpdir/scmroot/libcircle'...
$ git fetch origin d3daaf9f794869ab9b9da90606dd24f39313e2d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcircle
 * [new ref]         d3daaf9f794869ab9b9da90606dd24f39313e2d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d3daaf9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild