$ git clone -n https://src.fedoraproject.org/rpms/libunicode.git /var/lib/mock/f38-build-720554-97693/root/chroot_tmpdir/scmroot/libunicode
Cloning into '/var/lib/mock/f38-build-720554-97693/root/chroot_tmpdir/scmroot/libunicode'...
$ git fetch origin f9dea2630d3ecd6f0032ca430869d0a57c0f0d15:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libunicode
 * [new ref]         f9dea2630d3ecd6f0032ca430869d0a57c0f0d15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9dea26 Initial import (rhbz#2174383)