$ git clone -n https://src.fedoraproject.org/rpms/rust-elliptic-curve.git /var/lib/mock/f38-build-side-42-init-devel-1130569-30311/root/chroot_tmpdir/scmroot/rust-elliptic-curve
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1130569-30311/root/chroot_tmpdir/scmroot/rust-elliptic-curve'...
$ git fetch origin c9baf39d0c990a172c62dc699d95d9b402bcae29:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-elliptic-curve
 * [new ref]         c9baf39d0c990a172c62dc699d95d9b402bcae29 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9baf39 Initial import (#2213264)