$ git clone -n https://src.fedoraproject.org/rpms/python-modestmaps.git /var/lib/mock/f45-build-31609-654/root/chroot_tmpdir/scmroot/python-modestmaps
Cloning into '/var/lib/mock/f45-build-31609-654/root/chroot_tmpdir/scmroot/python-modestmaps'...
$ git fetch origin 4a39ddddcac24109696195319c19082bc6f6815e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-modestmaps
 * [new ref]         4a39ddddcac24109696195319c19082bc6f6815e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a39ddd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild