$ git clone -n https://src.fedoraproject.org/rpms/dh-autoreconf.git /var/lib/mock/f45-build-7465-364/root/chroot_tmpdir/scmroot/dh-autoreconf
Cloning into '/var/lib/mock/f45-build-7465-364/root/chroot_tmpdir/scmroot/dh-autoreconf'...
$ git fetch origin 761a57d1f82c57f6c0b4afa7920873521ed380e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dh-autoreconf
 * [new ref]         761a57d1f82c57f6c0b4afa7920873521ed380e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 761a57d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild