$ git clone -n https://src.fedoraproject.org/rpms/rust-foldhash.git /var/lib/mock/f42-build-59176572-6571499/root/chroot_tmpdir/scmroot/rust-foldhash
Cloning into '/var/lib/mock/f42-build-59176572-6571499/root/chroot_tmpdir/scmroot/rust-foldhash'...
$ git fetch origin f093f60099d3bff960a7701b281e7909999cce69:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-foldhash
 * [new ref]         f093f60099d3bff960a7701b281e7909999cce69 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f093f60 Update to version 0.1.5; Fixes RHBZ#2352731