$ git clone -n https://src.fedoraproject.org/rpms/rust-mbrman.git /var/lib/mock/f45-build-43163-800/root/chroot_tmpdir/scmroot/rust-mbrman
Cloning into '/var/lib/mock/f45-build-43163-800/root/chroot_tmpdir/scmroot/rust-mbrman'...
$ git fetch origin a094c824c54c78251d7666ced5e363210270bc86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-mbrman
 * [new ref]         a094c824c54c78251d7666ced5e363210270bc86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a094c82 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild