$ git clone -n https://src.fedoraproject.org/rpms/rust-pin-utils.git /var/lib/mock/f45-build-43872-807/root/chroot_tmpdir/scmroot/rust-pin-utils
Cloning into '/var/lib/mock/f45-build-43872-807/root/chroot_tmpdir/scmroot/rust-pin-utils'...
$ git fetch origin 2d105639f0625afe771b4412018420e42d663a05:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pin-utils
 * [new ref]         2d105639f0625afe771b4412018420e42d663a05 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d10563 Regenerate with rust2rpm v28