$ git clone -n https://src.fedoraproject.org/rpms/python-legacy-cgi.git /var/lib/mock/f45-build-31378-652/root/chroot_tmpdir/scmroot/python-legacy-cgi
Cloning into '/var/lib/mock/f45-build-31378-652/root/chroot_tmpdir/scmroot/python-legacy-cgi'...
$ git fetch origin b9e8b3393c1b9ac8ce012e365f80161c3ca80e85:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-legacy-cgi
 * [new ref]         b9e8b3393c1b9ac8ce012e365f80161c3ca80e85 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9e8b33 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild