$ git clone -n https://src.fedoraproject.org/rpms/amavisd-milter.git /var/lib/mock/f45-build-1670-306/root/chroot_tmpdir/scmroot/amavisd-milter
Cloning into '/var/lib/mock/f45-build-1670-306/root/chroot_tmpdir/scmroot/amavisd-milter'...
$ git fetch origin 19fde03891d14bad0260597699adecb62c8831ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/amavisd-milter
 * [new ref]         19fde03891d14bad0260597699adecb62c8831ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19fde03 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild