$ git clone -n https://src.fedoraproject.org/rpms/sigrok-firmware.git /var/lib/mock/f45-build-35955-700/root/chroot_tmpdir/scmroot/sigrok-firmware
Cloning into '/var/lib/mock/f45-build-35955-700/root/chroot_tmpdir/scmroot/sigrok-firmware'...
$ git fetch origin fb5a2824c681c5b1e39a018f74de72f1ce55ee56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sigrok-firmware
 * [new ref]         fb5a2824c681c5b1e39a018f74de72f1ce55ee56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb5a282 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild