$ git clone -n https://src.fedoraproject.org/rpms/eth-tools.git /var/lib/mock/f38-build-side-42-init-devel-806351-28199/root/chroot_tmpdir/scmroot/eth-tools
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-806351-28199/root/chroot_tmpdir/scmroot/eth-tools'...
$ git fetch origin 57712120ad8682465c42c57a6fed48f210e47f75:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/eth-tools
 * [new ref]         57712120ad8682465c42c57a6fed48f210e47f75 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5771212 11.4 Bump build number