$ git clone -n https://src.fedoraproject.org/rpms/rust-rkyv_derive0.7.git /var/lib/mock/f45-build-44443-813/root/chroot_tmpdir/scmroot/rust-rkyv_derive0.7
Cloning into '/var/lib/mock/f45-build-44443-813/root/chroot_tmpdir/scmroot/rust-rkyv_derive0.7'...
$ git fetch origin 8d8a0800651e758ca04bcdbef8a6006479da755b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rkyv_derive0.7
 * [new ref]         8d8a0800651e758ca04bcdbef8a6006479da755b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d8a080 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild