$ git clone -n https://src.fedoraproject.org/rpms/rust-onefetch-manifest.git /var/lib/mock/f45-build-43526-803/root/chroot_tmpdir/scmroot/rust-onefetch-manifest
Cloning into '/var/lib/mock/f45-build-43526-803/root/chroot_tmpdir/scmroot/rust-onefetch-manifest'...
$ git fetch origin 9bb3938dc087e7cc0d0d69b242745aea763203ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-onefetch-manifest
 * [new ref]         9bb3938dc087e7cc0d0d69b242745aea763203ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9bb3938 Update to version 2.28.1; Fixes RHBZ#2525979