$ git clone -n https://github.com/fedora-riscv/rust.git /var/lib/mock/f42-build-3227215-41167/root/chroot_tmpdir/scmroot/rust
Cloning into '/var/lib/mock/f42-build-3227215-41167/root/chroot_tmpdir/scmroot/rust'...
$ git fetch origin 614b01e8659320ba0054f95e9ed9f21ad3a050c2:KOJI_FETCH_HEAD
From https://github.com/fedora-riscv/rust
 * [new ref]         614b01e8659320ba0054f95e9ed9f21ad3a050c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 614b01e Bump release