$ git clone -n https://src.fedoraproject.org/rpms/python-Traits.git /var/lib/mock/f38-build-side-42-init-devel-789372-27979/root/chroot_tmpdir/scmroot/python-Traits
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-789372-27979/root/chroot_tmpdir/scmroot/python-Traits'...
$ git fetch origin 1451362763692620a45d9c112bc286a6f1825b3c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-Traits
 * [new ref]         1451362763692620a45d9c112bc286a6f1825b3c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1451362 Drop old BR on python3-mock