$ git clone -n https://src.fedoraproject.org/rpms/ghc-lens-family-core.git /var/lib/mock/f38-build-side-42-init-devel-632873-26381/root/chroot_tmpdir/scmroot/ghc-lens-family-core
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-632873-26381/root/chroot_tmpdir/scmroot/ghc-lens-family-core'...
$ git fetch origin fc405e7aff82b4834ec7ca16618253fc5c65122e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-lens-family-core
 * [new ref]         fc405e7aff82b4834ec7ca16618253fc5c65122e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc405e7 Convert to %autorelease and %autochangelog