$ git clone -n https://src.fedoraproject.org/rpms/python-iowait.git /var/lib/mock/f45-build-31113-650/root/chroot_tmpdir/scmroot/python-iowait
Cloning into '/var/lib/mock/f45-build-31113-650/root/chroot_tmpdir/scmroot/python-iowait'...
$ git fetch origin 67979d5fbb5906f1d0fcd453901052fc41337075:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-iowait
 * [new ref]         67979d5fbb5906f1d0fcd453901052fc41337075 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 67979d5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild