$ git clone -n https://src.fedoraproject.org/rpms/libdvdread.git /var/lib/mock/f45-build-16080-481/root/chroot_tmpdir/scmroot/libdvdread
Cloning into '/var/lib/mock/f45-build-16080-481/root/chroot_tmpdir/scmroot/libdvdread'...
$ git fetch origin d2b90c039bd40b4d1f7f52836c52652d4e345448:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdvdread
 * [new ref]         d2b90c039bd40b4d1f7f52836c52652d4e345448 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2b90c0 update to 7.1.1 (resolves rhbz#2502695)