$ git clone -n https://src.fedoraproject.org/rpms/rust-nusb.git /var/lib/mock/f45-build-43448-803/root/chroot_tmpdir/scmroot/rust-nusb
Cloning into '/var/lib/mock/f45-build-43448-803/root/chroot_tmpdir/scmroot/rust-nusb'...
$ git fetch origin cf664d7a03c06f8a01c6b9a700c93afa2e7cad58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nusb
 * [new ref]         cf664d7a03c06f8a01c6b9a700c93afa2e7cad58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf664d7 Import rhbz#2512173