$ git clone -n https://src.fedoraproject.org/rpms/libnsbmp.git /var/lib/mock/f45-build-16653-489/root/chroot_tmpdir/scmroot/libnsbmp
Cloning into '/var/lib/mock/f45-build-16653-489/root/chroot_tmpdir/scmroot/libnsbmp'...
$ git fetch origin bef960e785e8160290fe95360b2d313fcf2d6f9d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnsbmp
 * [new ref]         bef960e785e8160290fe95360b2d313fcf2d6f9d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bef960e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild