$ git clone -n https://src.fedoraproject.org/rpms/bubblewrap.git /var/lib/mock/f42-build-3367708-45050/root/chroot_tmpdir/scmroot/bubblewrap
Cloning into '/var/lib/mock/f42-build-3367708-45050/root/chroot_tmpdir/scmroot/bubblewrap'...
$ git fetch origin 77840fb8b9b256598929688335d7ab10b4a78004:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bubblewrap
 * [new ref]         77840fb8b9b256598929688335d7ab10b4a78004 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77840fb Update to 0.11.0 (#2322866)