$ git clone -n https://src.fedoraproject.org/rpms/buildah.git /var/lib/mock/f40-build-799333-142260/root/chroot_tmpdir/scmroot/buildah
Cloning into '/var/lib/mock/f40-build-799333-142260/root/chroot_tmpdir/scmroot/buildah'...
$ git fetch origin 1c81b4f1c26315fb80b2911fee90072d2e52ad2e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/buildah
 * [new ref]         1c81b4f1c26315fb80b2911fee90072d2e52ad2e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c81b4f [packit] 1.35.0 upstream release