$ git clone -n https://src.fedoraproject.org/rpms/rust-minus.git /var/lib/mock/f45-build-43271-801/root/chroot_tmpdir/scmroot/rust-minus
Cloning into '/var/lib/mock/f45-build-43271-801/root/chroot_tmpdir/scmroot/rust-minus'...
$ git fetch origin 144047771f4365bb8a5a521ebf7fddfce34daf4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-minus
 * [new ref]         144047771f4365bb8a5a521ebf7fddfce34daf4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1440477 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild