$ git clone -n https://src.fedoraproject.org/rpms/gawk-json.git /var/lib/mock/f45-build-9624-406/root/chroot_tmpdir/scmroot/gawk-json
Cloning into '/var/lib/mock/f45-build-9624-406/root/chroot_tmpdir/scmroot/gawk-json'...
$ git fetch origin 85bb3e311498e261eec7424c10ffcae316e8fcbc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gawk-json
 * [new ref]         85bb3e311498e261eec7424c10ffcae316e8fcbc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85bb3e3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild