$ git clone -n https://src.fedoraproject.org/rpms/perl-Text-Tree.git /var/lib/mock/f45-build-27133-621/root/chroot_tmpdir/scmroot/perl-Text-Tree
Cloning into '/var/lib/mock/f45-build-27133-621/root/chroot_tmpdir/scmroot/perl-Text-Tree'...
$ git fetch origin 04cb0534564a8d571f1e80167024d68a01de7308:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Text-Tree
 * [new ref]         04cb0534564a8d571f1e80167024d68a01de7308 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04cb053 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild