$ git clone -n https://src.fedoraproject.org/rpms/libebur128.git /var/lib/mock/f45-build-16141-483/root/chroot_tmpdir/scmroot/libebur128
Cloning into '/var/lib/mock/f45-build-16141-483/root/chroot_tmpdir/scmroot/libebur128'...
$ git fetch origin f62d53d17e114d5cd8a348fc0bd1ace7c785b6c2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libebur128
 * [new ref]         f62d53d17e114d5cd8a348fc0bd1ace7c785b6c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f62d53d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild