$ git clone -n https://src.fedoraproject.org/rpms/rust-dtoa0.4.git /var/lib/mock/f38-build-side-43-rust-devel-1411703-31436/root/chroot_tmpdir/scmroot/rust-dtoa0.4
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1411703-31436/root/chroot_tmpdir/scmroot/rust-dtoa0.4'...
$ git fetch origin 9a839c333e56622e187bd5f444c283a9f721d07f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dtoa0.4
 * [new ref]         9a839c333e56622e187bd5f444c283a9f721d07f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a839c3 Initial import (dtoa 0.4 compat package)