$ git clone -n https://src.fedoraproject.org/rpms/heffte.git /var/lib/mock/f45-build-13392-450/root/chroot_tmpdir/scmroot/heffte
Cloning into '/var/lib/mock/f45-build-13392-450/root/chroot_tmpdir/scmroot/heffte'...
$ git fetch origin 7f8d5c2c29de0faf5a844e54da06c46ee10ce5e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/heffte
 * [new ref]         7f8d5c2c29de0faf5a844e54da06c46ee10ce5e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7f8d5c2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild