$ git clone -n https://src.fedoraproject.org/rpms/python-flask-principal.git /var/lib/mock/f45-build-30677-647/root/chroot_tmpdir/scmroot/python-flask-principal
Cloning into '/var/lib/mock/f45-build-30677-647/root/chroot_tmpdir/scmroot/python-flask-principal'...
$ git fetch origin 64c1e1b7c632f8bf3a207c6486f64b38ed762913:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-flask-principal
 * [new ref]         64c1e1b7c632f8bf3a207c6486f64b38ed762913 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64c1e1b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild