$ git clone -n https://src.fedoraproject.org/rpms/libdvdnav.git /var/lib/mock/f40-build-2219714-52640/root/chroot_tmpdir/scmroot/libdvdnav
Cloning into '/var/lib/mock/f40-build-2219714-52640/root/chroot_tmpdir/scmroot/libdvdnav'...
$ git fetch origin 49a5bb60b8fce9a4c9332a20ff44b62af47e7052:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdvdnav
 * [new ref]         49a5bb60b8fce9a4c9332a20ff44b62af47e7052 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 49a5bb6 SPDX Migration