$ git clone -n https://src.fedoraproject.org/rpms/golang-github-yandex-cloud-genproto.git /var/lib/mock/f39-build-1800647-41796/root/chroot_tmpdir/scmroot/golang-github-yandex-cloud-genproto
Cloning into '/var/lib/mock/f39-build-1800647-41796/root/chroot_tmpdir/scmroot/golang-github-yandex-cloud-genproto'...
$ git fetch origin f6fded7380ac3c3841924f8caa2fd4c501241e3b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-yandex-cloud-genproto
 * [new ref]         f6fded7380ac3c3841924f8caa2fd4c501241e3b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6fded7 Initial import