$ git clone -n https://src.fedoraproject.org/rpms/rust-toml_write.git /var/lib/mock/f45-build-45550-823/root/chroot_tmpdir/scmroot/rust-toml_write
Cloning into '/var/lib/mock/f45-build-45550-823/root/chroot_tmpdir/scmroot/rust-toml_write'...
$ git fetch origin 59e6ec2a8b2a3eea0e0a5422a44d1ba6e2af553e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-toml_write
 * [new ref]         59e6ec2a8b2a3eea0e0a5422a44d1ba6e2af553e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 59e6ec2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild