$ git clone -n https://src.fedoraproject.org/rpms/nanovna-saver.git /var/lib/mock/f45-build-19495-549/root/chroot_tmpdir/scmroot/nanovna-saver
Cloning into '/var/lib/mock/f45-build-19495-549/root/chroot_tmpdir/scmroot/nanovna-saver'...
$ git fetch origin c4479fdccd2853e9047b0f4cd58e237f7bdebefc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nanovna-saver
 * [new ref]         c4479fdccd2853e9047b0f4cd58e237f7bdebefc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4479fd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild