$ git clone -n https://src.fedoraproject.org/rpms/mingw-python-blinker.git /var/lib/mock/f45-build-18652-525/root/chroot_tmpdir/scmroot/mingw-python-blinker
Cloning into '/var/lib/mock/f45-build-18652-525/root/chroot_tmpdir/scmroot/mingw-python-blinker'...
$ git fetch origin 9e644fd534c5378ec827aa2ee4cb128f644c7d52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-python-blinker
 * [new ref]         9e644fd534c5378ec827aa2ee4cb128f644c7d52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e644fd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild