$ git clone -n https://src.fedoraproject.org/rpms/rust-hash32-derive.git /var/lib/mock/f45-build-42298-792/root/chroot_tmpdir/scmroot/rust-hash32-derive
Cloning into '/var/lib/mock/f45-build-42298-792/root/chroot_tmpdir/scmroot/rust-hash32-derive'...
$ git fetch origin 2228b03fa6e66fdc8a5755f9f715e9d11c8a7246:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-hash32-derive
 * [new ref]         2228b03fa6e66fdc8a5755f9f715e9d11c8a7246 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2228b03 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild