$ git clone -n https://src.fedoraproject.org/rpms/hyphen-gu.git /var/lib/mock/f45-build-13831-455/root/chroot_tmpdir/scmroot/hyphen-gu
Cloning into '/var/lib/mock/f45-build-13831-455/root/chroot_tmpdir/scmroot/hyphen-gu'...
$ git fetch origin 627ffdff3bff9dec1179ea136d58e9f93951b6f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hyphen-gu
 * [new ref]         627ffdff3bff9dec1179ea136d58e9f93951b6f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 627ffdf Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild