$ git clone -n https://src.fedoraproject.org/rpms/ghc-lens.git /var/lib/mock/f38-build-side-42-init-devel-1079738-29824/root/chroot_tmpdir/scmroot/ghc-lens
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1079738-29824/root/chroot_tmpdir/scmroot/ghc-lens'...
$ git fetch origin 7d8d74c4f524cfc03b390056b5d8d7f911ce9378:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-lens
 * [new ref]         7d8d74c4f524cfc03b390056b5d8d7f911ce9378 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d8d74c Convert to %autorelease and %autochangelog