$ git clone -n https://src.fedoraproject.org/rpms/rust-object-rewrite.git /var/lib/mock/f45-build-43459-803/root/chroot_tmpdir/scmroot/rust-object-rewrite
Cloning into '/var/lib/mock/f45-build-43459-803/root/chroot_tmpdir/scmroot/rust-object-rewrite'...
$ git fetch origin 08c745e27223de2d3316a63267021c21063759ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-object-rewrite
 * [new ref]         08c745e27223de2d3316a63267021c21063759ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 08c745e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild