$ git clone -n https://src.fedoraproject.org/rpms/rust-env_logger0.9.git /var/lib/mock/f45-build-41587-784/root/chroot_tmpdir/scmroot/rust-env_logger0.9
Cloning into '/var/lib/mock/f45-build-41587-784/root/chroot_tmpdir/scmroot/rust-env_logger0.9'...
$ git fetch origin b9c63c766b53039df4b504f385f9a8995e2ab1fd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-env_logger0.9
 * [new ref]         b9c63c766b53039df4b504f385f9a8995e2ab1fd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9c63c7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild