$ git clone -n https://src.fedoraproject.org/rpms/rust-onefetch.git /var/lib/mock/f41-build-855390-167123/root/chroot_tmpdir/scmroot/rust-onefetch
Cloning into '/var/lib/mock/f41-build-855390-167123/root/chroot_tmpdir/scmroot/rust-onefetch'...
$ git fetch origin d9824b57971d3d8a964d17812e6d20294a8afe09:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-onefetch
 * [new ref]         d9824b57971d3d8a964d17812e6d20294a8afe09 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d9824b5 Update to 2.22.0 (close RHBZ#2313678)