$ git clone -n https://src.fedoraproject.org/rpms/execstack.git /var/lib/mock/f39-build-1976359-43332/root/chroot_tmpdir/scmroot/execstack
Cloning into '/var/lib/mock/f39-build-1976359-43332/root/chroot_tmpdir/scmroot/execstack'...
$ git fetch origin 88ccc6fa85acd4a7cf1df3be2e90f1abc11ab976:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/execstack
 * [new ref]         88ccc6fa85acd4a7cf1df3be2e90f1abc11ab976 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88ccc6f Convert license tag to SPDX