$ git clone -n https://src.fedoraproject.org/rpms/mate-icon-theme.git /var/lib/mock/f45-build-18058-507/root/chroot_tmpdir/scmroot/mate-icon-theme
Cloning into '/var/lib/mock/f45-build-18058-507/root/chroot_tmpdir/scmroot/mate-icon-theme'...
$ git fetch origin beaffa23b3d1965e0e36fa60c615552ddc6d90c2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mate-icon-theme
 * [new ref]         beaffa23b3d1965e0e36fa60c615552ddc6d90c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at beaffa2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild