$ git clone -n https://src.fedoraproject.org/rpms/mingw-flac.git /var/lib/mock/f45-build-18427-515/root/chroot_tmpdir/scmroot/mingw-flac
Cloning into '/var/lib/mock/f45-build-18427-515/root/chroot_tmpdir/scmroot/mingw-flac'...
$ git fetch origin 64d0c5f2fe57231a3e0324562e4b0807f87e9df6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-flac
 * [new ref]         64d0c5f2fe57231a3e0324562e4b0807f87e9df6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64d0c5f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild