$ git clone -n https://src.fedoraproject.org/rpms/python-mdx_gh_links.git /var/lib/mock/f45-build-31508-652/root/chroot_tmpdir/scmroot/python-mdx_gh_links
Cloning into '/var/lib/mock/f45-build-31508-652/root/chroot_tmpdir/scmroot/python-mdx_gh_links'...
$ git fetch origin f4ecac5a379e59bc77f08d169ed75816108ddfba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mdx_gh_links
 * [new ref]         f4ecac5a379e59bc77f08d169ed75816108ddfba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f4ecac5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild