$ git clone -n https://src.fedoraproject.org/rpms/rust-rdrand.git /var/lib/mock/f45-build-44423-813/root/chroot_tmpdir/scmroot/rust-rdrand
Cloning into '/var/lib/mock/f45-build-44423-813/root/chroot_tmpdir/scmroot/rust-rdrand'...
$ git fetch origin fd7bcf71ebf7dd59f367aadfe8a4b527ecf9d69f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rdrand
 * [new ref]         fd7bcf71ebf7dd59f367aadfe8a4b527ecf9d69f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd7bcf7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild