$ git clone -n https://src.fedoraproject.org/rpms/libcacard.git /var/lib/mock/f45-build-15908-480/root/chroot_tmpdir/scmroot/libcacard
Cloning into '/var/lib/mock/f45-build-15908-480/root/chroot_tmpdir/scmroot/libcacard'...
$ git fetch origin 3e0186d9f86d5d6bdf80b1cd681083f48f9cb4aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcacard
 * [new ref]         3e0186d9f86d5d6bdf80b1cd681083f48f9cb4aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e0186d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild