$ git clone -n https://src.fedoraproject.org/rpms/python-x3dh.git /var/lib/mock/f45-build-39966-765/root/chroot_tmpdir/scmroot/python-x3dh
Cloning into '/var/lib/mock/f45-build-39966-765/root/chroot_tmpdir/scmroot/python-x3dh'...
$ git fetch origin 81cad23e8f576473cb397eb9d89c457430302667:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-x3dh
 * [new ref]         81cad23e8f576473cb397eb9d89c457430302667 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81cad23 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild