$ git clone -n https://src.fedoraproject.org/rpms/ghc-lens-family-core.git /var/lib/mock/f39-build-1922700-42986/root/chroot_tmpdir/scmroot/ghc-lens-family-core
Cloning into '/var/lib/mock/f39-build-1922700-42986/root/chroot_tmpdir/scmroot/ghc-lens-family-core'...
$ git fetch origin a448e95fb3a61fd30b578ac0ef591180af245eb0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-lens-family-core
 * [new ref]         a448e95fb3a61fd30b578ac0ef591180af245eb0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a448e95 bump release