$ git clone -n https://src.fedoraproject.org/rpms/rust-wax.git /var/lib/mock/f38-build-side-43-rust-devel-1416956-31458/root/chroot_tmpdir/scmroot/rust-wax
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1416956-31458/root/chroot_tmpdir/scmroot/rust-wax'...
$ git fetch origin f8c95d82753b293cbf36fe497ccd3cf1d2183960:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-wax
 * [new ref]         f8c95d82753b293cbf36fe497ccd3cf1d2183960 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f8c95d8 Initial Fedora package