$ git clone -n https://src.fedoraproject.org/rpms/rust-num-complex0.3.git /var/lib/mock/f45-build-43485-803/root/chroot_tmpdir/scmroot/rust-num-complex0.3
Cloning into '/var/lib/mock/f45-build-43485-803/root/chroot_tmpdir/scmroot/rust-num-complex0.3'...
$ git fetch origin 44e96353272f59643d78ac943a095697e5b2c663:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-num-complex0.3
 * [new ref]         44e96353272f59643d78ac943a095697e5b2c663 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 44e9635 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild