$ git clone -n https://src.fedoraproject.org/rpms/rust-utf8parse.git /var/lib/mock/f45-build-46020-830/root/chroot_tmpdir/scmroot/rust-utf8parse
Cloning into '/var/lib/mock/f45-build-46020-830/root/chroot_tmpdir/scmroot/rust-utf8parse'...
$ git fetch origin 52a17a3cbd8a83c47f7dc8b97e30cf307c1148e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-utf8parse
 * [new ref]         52a17a3cbd8a83c47f7dc8b97e30cf307c1148e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52a17a3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild