$ git clone -n https://src.fedoraproject.org/rpms/libatomic_ops.git /var/lib/mock/f45-build-15862-480/root/chroot_tmpdir/scmroot/libatomic_ops
Cloning into '/var/lib/mock/f45-build-15862-480/root/chroot_tmpdir/scmroot/libatomic_ops'...
$ git fetch origin e7e662a9f6812ee1ee1324c9a68f9faac7fb39d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libatomic_ops
 * [new ref]         e7e662a9f6812ee1ee1324c9a68f9faac7fb39d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7e662a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild