$ git clone -n https://src.fedoraproject.org/rpms/rust-dolby_vision.git /var/lib/mock/f45-build-43703-805/root/chroot_tmpdir/scmroot/rust-dolby_vision
Cloning into '/var/lib/mock/f45-build-43703-805/root/chroot_tmpdir/scmroot/rust-dolby_vision'...
$ git fetch origin 756cae1181a816675401db166f63eca8a1d1a091:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dolby_vision
 * [new ref]         756cae1181a816675401db166f63eca8a1d1a091 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 756cae1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild