$ git clone -n https://src.fedoraproject.org/rpms/mate-themes.git /var/lib/mock/f45-build-18091-508/root/chroot_tmpdir/scmroot/mate-themes
Cloning into '/var/lib/mock/f45-build-18091-508/root/chroot_tmpdir/scmroot/mate-themes'...
$ git fetch origin 9bfeb35b9ff98d2c8f5577fa0642ede25f39e2fb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mate-themes
 * [new ref]         9bfeb35b9ff98d2c8f5577fa0642ede25f39e2fb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9bfeb35 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild