$ git clone -n https://src.fedoraproject.org/rpms/rust-vm-memory.git /var/lib/mock/f45-build-46082-830/root/chroot_tmpdir/scmroot/rust-vm-memory
Cloning into '/var/lib/mock/f45-build-46082-830/root/chroot_tmpdir/scmroot/rust-vm-memory'...
$ git fetch origin 18401c524c49ae479dab9447fe5a9d4c979c9e1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vm-memory
 * [new ref]         18401c524c49ae479dab9447fe5a9d4c979c9e1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18401c5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild