$ git clone -n https://src.fedoraproject.org/rpms/rust-rustdoc-types0.56.git /var/lib/mock/f45-build-35476-695/root/chroot_tmpdir/scmroot/rust-rustdoc-types0.56
Cloning into '/var/lib/mock/f45-build-35476-695/root/chroot_tmpdir/scmroot/rust-rustdoc-types0.56'...
$ git fetch origin f59e446e81e3595a48ddb7209047db70f88e4746:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustdoc-types0.56
 * [new ref]         f59e446e81e3595a48ddb7209047db70f88e4746 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f59e446 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild