$ git clone -n https://src.fedoraproject.org/rpms/perl-Config-Model-TkUI.git /var/lib/mock/f45-build-22491-591/root/chroot_tmpdir/scmroot/perl-Config-Model-TkUI
Cloning into '/var/lib/mock/f45-build-22491-591/root/chroot_tmpdir/scmroot/perl-Config-Model-TkUI'...
$ git fetch origin b37d69497c5b0b84713f2a977996abdc995645e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Config-Model-TkUI
 * [new ref]         b37d69497c5b0b84713f2a977996abdc995645e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b37d694 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild