$ git clone -n https://src.fedoraproject.org/rpms/python-hpack.git /var/lib/mock/f45-build-31040-649/root/chroot_tmpdir/scmroot/python-hpack
Cloning into '/var/lib/mock/f45-build-31040-649/root/chroot_tmpdir/scmroot/python-hpack'...
$ git fetch origin 3c4b1b1cc48d79e3716efc17b1d2867e07b07ec0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-hpack
 * [new ref]         3c4b1b1cc48d79e3716efc17b1d2867e07b07ec0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c4b1b1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild