$ git clone -n https://src.fedoraproject.org/rpms/vim.git /var/lib/mock/f39-build-2202499-51884/root/chroot_tmpdir/scmroot/vim
Cloning into '/var/lib/mock/f39-build-2202499-51884/root/chroot_tmpdir/scmroot/vim'...
$ git fetch origin 8b3099979b07ed51d00fbcf71c91c2083fa6dfe6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vim
 * [new ref]           8b3099979b07ed51d00fbcf71c91c2083fa6dfe6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b309997 - patchlevel 16