$ git clone -n https://src.fedoraproject.org/rpms/libavc1394.git /var/lib/mock/f45-build-15861-480/root/chroot_tmpdir/scmroot/libavc1394
Cloning into '/var/lib/mock/f45-build-15861-480/root/chroot_tmpdir/scmroot/libavc1394'...
$ git fetch origin 6ce4ef9abc918f8a590ca08059fcc00f50967f01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libavc1394
 * [new ref]         6ce4ef9abc918f8a590ca08059fcc00f50967f01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ce4ef9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild