$ git clone -n https://src.fedoraproject.org/rpms/python-mackup.git /var/lib/mock/f45-build-31493-652/root/chroot_tmpdir/scmroot/python-mackup
Cloning into '/var/lib/mock/f45-build-31493-652/root/chroot_tmpdir/scmroot/python-mackup'...
$ git fetch origin e08b3302253237e9571abd1fb2d7c67b3bb6b7f9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mackup
 * [new ref]         e08b3302253237e9571abd1fb2d7c67b3bb6b7f9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e08b330 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild