$ git clone -n https://src.fedoraproject.org/rpms/rust-zerocopy-derive0.7.git /var/lib/mock/f45-build-46352-833/root/chroot_tmpdir/scmroot/rust-zerocopy-derive0.7
Cloning into '/var/lib/mock/f45-build-46352-833/root/chroot_tmpdir/scmroot/rust-zerocopy-derive0.7'...
$ git fetch origin b910a8d1835cffa64aa71c3e5b0e63d219a7f80f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zerocopy-derive0.7
 * [new ref]         b910a8d1835cffa64aa71c3e5b0e63d219a7f80f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b910a8d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild