$ git clone -n https://src.fedoraproject.org/rpms/rust-fiat-crypto.git /var/lib/mock/f38-build-side-43-rust-devel-1419818-31460/root/chroot_tmpdir/scmroot/rust-fiat-crypto
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1419818-31460/root/chroot_tmpdir/scmroot/rust-fiat-crypto'...
$ git fetch origin a0b9a486dfca6f394188ea02138d5a74d8087f5f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-fiat-crypto
 * [new ref]         a0b9a486dfca6f394188ea02138d5a74d8087f5f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a0b9a48 Initial import (#2213270)